|  |  | The Department of Epidemiology Selected Recent Publications
| Researchers | Title | Publication | Abstract | Zhang Y, Reilly KH, Tong W, Xu T, Chen J, Bazzano LA, Qiao D, Ju Z, Chen C, He J. | Blood pressure and clinical outcome among patients with acute stroke in inner Mongolia, China. | J Hypertens 2008 July; 26(7):1446-1452. | Objectives The association between blood pressure and short-term clinical outcome of acute stroke is inconclusive. We studied the association between admission blood pressure and in-hospital death or disability among acute stroke patients in Inner Mongolia, China.
Methods A total of 2178 acute ischemic stroke and 1760 hemorrhagic stroke patients confirmed by a computed tomography scan or magnetic resonance imaging were included in the present study. Blood pressure and other study variables were collected within the first 24 h of hospital admission. Clinical outcomes were evaluated by trained neurologists during hospitalization.
Results The in-hospital case-fatality rate was higher for acute hemorrhagic stroke (5.9%) than it was for acute ischemic stroke (1.8%), whereas the disability rate was higher for those with acute ischemic stroke (41.3%) than those with acute hemorrhagic stroke (34.4%) at discharge. Blood pressure at admission was not significantly associated with clinical outcome in acute ischemic stroke. On the contrary, systolic and diastolic blood pressures were significantly and positively associated with odds of death or disability in acute hemorrhagic stroke. For example, compared to those with a systolic blood pressure less than 140 mmHg, multiple-adjusted odds ratio (95% confidence interval) of death/disability was 1.38 (0.96, 1.99), 1.42 (1.00, 2.03), 1.84 (1.28, 2.64), and 1.91 (1.35, 2.70) among participants with systolic blood pressure 140-159, 160-179, 180-199, and at least 200 mmHg, respectively (P < 0.0001 for linear trend).
Conclusion Increased systolic and diastolic blood pressure were significantly and positively associated with death and disability among patients with acute hemorrhagic stroke, but not acute ischemic stroke, in inner Mongolia, China. | | Mihalopoulos NL, Berenson GS. | Cardiovascular risk factors among internal medicine residents. | Prev Cardiol 2008 Spring;11(2):76-81. | Modification of risk factors can reduce the number of deaths due to cardiovascular disease (CVD). Internal medicine (IM) residents devote significant clinical time to help patients modify CVD risk factors but may fail to recognize the presence of such factors in their own lives. The prevalence of major modifiable risk factors was assessed in IM residents. Of 101 eligible residents, 56 completed at least 1 component of the study. None had symptoms or history of CVD, and 11 (20%) had >=2 CVD risk factors. Of 39 subjects who had physical assessment, 3 had systolic hypertension and 13 had a body mass index >=25. Of 38 patients with fasting lipid measurements, 13 had total cholesterol >200 mg/dL; 28 had low-density lipoprotein >=100 mg/dL, with 7 >160 mg/dL; and 7 had high-density lipoprotein <40 mg/dL. Three residents smoked 10 cigarettes per day and 15 were sedentary. Training in IM should include strategies to increase awareness of modifiable personal risk factors for CVD, as well as strategies to reduce or eliminate them. | | Morisky DE, Ang A, Krousel-Wood M, Ward HJ. | Predictive validity of a medication adherence measure in an outpatient setting. | J Clin Hypertens May 2008;10(5):348-354. | This study examines the psychometric properties and tests the concurrent and predictive validity of a structured, self-reported medication adherence measure in patients with hypertension. The authors also assessed various psychosocial determinants of adherence, such as knowledge, social support, satisfaction with care, and complexity of the medical regimen. A total of 1367 patients participated in the study; mean age was 52.5 years, 40.8% were male, 76.5% were black, 50.8% graduated from high school, 26% were married, and 54.1% had income <$5,000. The 8-item medication adherence scale was reliable ([alpha]=.83) and significantly associated with blood pressure control (P<.05). Using a cutpoint of <6, the sensitivity of the measure to identify patients with poor blood pressure control was estimated to be 93%, and the specificity was 53%. The medication adherence measure proved to be reliable, with good concurrent and predictive validity in primarily low-income, minority patients with hypertension and might function as a screening tool in outpatient settings with other patient groups. | | Muntner P, Srinivasan S, Menke A, Patel DA, Chen W, Berenson G. | Impact of childhood metabolic syndrome components on the risk of elevated uric acid in adulthood: the Bogalusa Heart Study. | Am J Med Sci 2008 May;335(5):332-337. | Background Cross-sectional studies indicate metabolic syndrome is a risk factor for elevated serum uric acid. However, longitudinal data on this association are limited.
Methods Bogalusa Heart Study participants (n = 517) were examined as children, aged 5 to 17 years, and as adults 13 to 21 years later. Childhood metabolic syndrome components included the highest quartile (specific for year of age, race, sex, and study year) of body mass index, insulin resistance, blood pressure, and triglycerides and lowest quartile of HDL cholesterol. Metabolic syndrome was defined as the presence of 3 or more of these components and elevated serum uric acid, in adulthood, as values at or above the 90th percentile (specific for race and sex).
Results For males, after multivariate adjustment, the odds ratios (95% confidence interval) of elevated serum uric acid associated with high blood pressure, low HDL-cholesterol, high triglycerides, insulin resistance, and high body mass index were 2.61 (1.13, 6.03), 1.47 (0.57, 3.80), 1.30 (0.55, 3.08), 2.87 (1.23, 6.71), and 3.25 (1.36, 7.74), respectively. The analogous odds ratios for females were 2.12 (0.99, 4.54), 0.38 (0.14, 1.04), 1.16 (0.54, 2.46), 1.78 (0.83, 3.79), and 3.55 (1.73, 7.31), respectively. Males and females with the metabolic syndrome in childhood were 2.60 (1.08, 6.27) and 3.01 (1.34, 6.75) times more likely to have elevated serum uric acid as adults, respectively.
Conclusions Metabolic syndrome and high body mass index in childhood were predictors of elevated uric acid in adulthood. | | Hogben M, Kissinger P. | A review of partner notification for sex partners of men infected with chlamydia. | Sex Transm Dis 2008. | A discussion of the feasibility and use of chlamydial screening of men requires attention to management of their partners. Because of the large numbers of chlamydial cases in the United States, public health-mediated partner notification, as a first line partner management strategy, is not practical. This article reviews the evidence for patient-based referral. We reviewed studies (1997-2007) from the United States and other industrialized nations in which men diagnosed with chlamydia were exposed to some form of partner referral instruction. Randomized controlled trial and observational data were included; where data permitted, we estimated proportions of partners notified and treated. Nine studies from 3 countries yielded 8 estimates of notification rates and 10 of treatment rates. Estimates varied according to whether patient referral was accompanied by counseling, contact slips, or medications for partners. Overall, 48% to 79% of partners seemed to be notified with a smaller proportion subsequently treated (30%-61%). Higher rates of notification and treatment were associated with various enhancements to basic referral instructions, especially if patients were offered medications to bring to partners. Data also suggest a role for contact slips. Resource constraints suggest that public health investigation should be limited to high-priority cases (e.g., where evidence of dense sexual networks exists) and monitoring of patient referral efforts. | | Belancio VP, Hedges DJ, Deininger P. | Mammalian non-LTR retrotransposons: for better or worse, in sickness and in health. | Genome Res 2008 Mar;18(3):343-58. | Transposable elements (TEs) have shared an exceptionally long coexistence with their host organisms and have come to occupy a significant fraction of eukaryotic genomes. The bulk of the expansion occurring within mammalian genomes has arisen from the activity of type I retrotransposons, which amplify in a "copy-and-paste" fashion through an RNA intermediate. For better or worse, the sequences of these retrotransposons are now wedded to the genomes of their mammalian hosts. Although there are several reported instances of the positive contribution of mobile elements to their host genomes, these discoveries have occurred alongside growing evidence of the role of TEs in human disease and genetic instability. Here we examine, with a particular emphasis on human retrotransposon activity, several newly discovered aspects of mammalian retrotransposon biology. We consider their potential impact on host biology as well as their ultimate implications for the nature of the TE-host relationship. | | Chen W, Srinivasan SR, Berenson GS. | Path analysis of metabolic syndrome components in black versus white children, adolescents, and adults: the Bogalusa Heart Study. | Ann Epidemiol 2008 Feb; 18(2):85-91. | Purpose Examine the complex relationships among metabolic syndrome components in black and white individuals by growth periods.
Methods Path analyses of metabolic syndrome components were performed on 8203 black and white healthy subjects (64.3% white and 47.9% male) comprising children (4-11 years), adolescents (12-18 years), and adults (19-44 years).
Results The direct effect of body mass index (BMI) on fasting insulin levels was greatest among all the paths for each age group in both races.
In general, path coefficients were greater in whites than in blacks except for the age-mean arterial pressure (MAP) path and greater in children and adults than in adolescents. The direct age effect on MAP was greater in black versus white adults (p = 0.010 for race difference). Whites showed greater direct effects of BMI on MAP in children (p = 0.007), adolescents (p = 0.090), and adults (p = 0.022); BMI on insulin in adolescents (p < 0.001); BMI on triglycerides in children (p = 0.003); and insulin on triglycerides in adults (p < 0.001). A race difference in the effect of BMI on fasting glucose was noted among adolescents (p = 0.048).
Conclusions The black-white differences in the relationships of obesity and insulin resistance measures to other components may account for the lower prevalence of metabolic syndrome in the black population. | | Hogben M, Kissinger P. | A review of partner notification for sex partners of men infected with chlamydia. | Sex Transm Dis 2008. | A discussion of the feasibility and use of chlamydial screening of men requires attention to management of their partners. Because of the large numbers of chlamydial cases in the United States, public health-mediated partner notification, as a first line partner management strategy, is not practical. This article reviews the evidence for patient-based referral. We reviewed studies (1997-2007) from the United States and other industrialized nations in which men diagnosed with chlamydia were exposed to some form of partner referral instruction. Randomized controlled trial and observational data were included; where data permitted, we estimated proportions of partners notified and treated. Nine studies from 3 countries yielded 8 estimates of notification rates and 10 of treatment rates. Estimates varied according to whether patient referral was accompanied by counseling, contact slips, or medications for partners. Overall, 48% to 79% of partners seemed to be notified with a smaller proportion subsequently treated (30%-61%). Higher rates of notification and treatment were associated with various enhancements to basic referral instructions, especially if patients were offered medications to bring to partners. Data also suggest a role for contact slips. Resource constraints suggest that public health investigation should be limited to high-priority cases (e.g., where evidence of dense sexual networks exists) and monitoring of patient referral efforts. | | Kelly TN, Gu D, Chen J, Huang J, Chen J, Duan X, Wu X, Chen C, He J. | Cigarette smoking and risk of stroke in the Chinese adult population. | Stroke 2008. | Background and Purpose We studied the relationship between cigarette smoking and stroke incidence and mortality in the Chinese adult population.
Methods We conducted a prospective cohort study in a nationally representative sample of 169 871 Chinese men and women aged 40 years and older. Data on cigarette smoking and other covariables were collected at a baseline examination in 1991 using a standard protocol. Follow-up evaluation was conducted in 1999 to 2000, with a response rate of 93.4%.
Results During an average of 8.3 years follow-up, a total of 6780 stroke events (3979 fatal strokes) were observed. The multivariate-adjusted relative risks (95% confidence interval) of stroke incidence and mortality associated with present cigarette smoking were 1.28 (1.19 to 1.37) and 1.13 (1.03 to 1.25) in men and 1.25 (1.13 to 1.37) and 1.19 (1.04 to 1.36) in women, respectively. The corresponding population attributable risks were 14.2% and 7.1% in men and 3.1% and 2.4% in women. Compared to never-smokers, the multivariate-adjusted relative risks of stroke incidence (95% confidence interval) were 1.21 (1.12 to 1.31), 1.21 (1.11 to 1.32), and 1.36 (1.25 to 1.47) for those who smoked 1 to 9, 10 to 19, and >=20 cigarettes per day; and 1.18 (1.09 to 1.28), 1.25 (1.15 to 1.35), and 1.34 (1.24 to 1.44) for those who smoked 1 to 11, 12 to 26, and >26 pack-years, respectively (both P<0.0001 for linear trends).
Conclusions Our study identified a positive and dose-response relationship between cigarette smoking and risk of stroke. Smoking prevention and cessation programs should be an important strategy for reducing the burden of stroke in Chinese adults. | | Rabito F, Iqbal S, Kiernan MP, Holt E, Chew GL. | Children's respiratory health and mold levels in New Orleans after Katrina: a preliminary look. | J Allergy Clin Immunol 2008 March;121(3):622-625. | Background When the federal levee system broke after Hurricane Katrina, 80 percent of New Orleans, approximately 134,000 homes, flooded. As repopulation and revitalization activities continue, exposure to mold and other respiratory irritants has emerged as a major health concern; however, there has been no study examining children's respiratory health and indoor mold levels in the post-Katrina environment.
Objective The Children's Respiratory Health Study was designed as a preliminary examination of indoor air levels of mold, children's lung function, and common indices of respiratory health in a select sample of children returning to live in New Orleans immediately after Hurricane Katrina.
Methods Children were recruited from a private primary school in the Garden District of New Orleans. Respiratory health questionnaire and spirometric data were collected on children 7 to 14 years of age, and mold air sampling was conducted at baseline and again after 2 months.
Conclusions There was an overall decrease in mold levels and respiratory symptoms over the study period, and indoor mold levels were low despite reported hurricane damage. | | Sivertsen A, Wilcox AJ, Skjaerven R, Vindenes HA, Abyholm F, Harville E, Lie RT. | Familial risk of oral clefts by morphological type and severity: population based cohort study of first degree relatives. | BMJ 2008;336(7641):432-437. | Objective To estimate the relative risk of recurrence of oral cleft in first degree relatives in relation to cleft morphology.
Design Population based cohort study. Setting Data from the medical birth registry of Norway linked with clinical data on virtually all cleft patients treated in Norway over a 35 year period. Participants 2.1 million children born in Norway between 1967 and 2001, 4138 of whom were treated for an oral cleft.
Main outcome measure Relative risk of recurrence of isolated clefts from parent to child and between full siblings, for anatomic subgroups of clefts. Results Among first degree relatives, the relative risk of recurrence of cleft was 32 (95% confidence interval 24.6 to 40.3) for any cleft lip and 56 (37.2 to 84.8) for cleft palate only (P difference=0.02). The risk of clefts among children of affected mothers and affected fathers was similar. Risks of recurrence were also similar for parent-offspring and sibling-sibling pairs. The "crossover" risk between any cleft lip and cleft palate only was 3.0 (1.3 to 6.7). The severity of the primary case was unrelated to the risk of recurrence. Conclusions The stronger family recurrence of cleft palate only suggests a larger genetic component for cleft palate only than for any cleft lip. The weaker risk of crossover between the two types of cleft indicates relatively distinct causes. The similarity of mother-offspring, father-offspring, and sibling-sibling risks is consistent with genetic risk that works chiefly through fetal genes. Anatomical severity does not affect the recurrence risk in first degree relatives, which argues against a multifactorial threshold model of causation. | | Magnussen CG, Raitakari OT, Thomson R, Juonala M, Patel DA, Viikari JSA, Marniemi J, Srinivasan S, Berenson G, Dwyer T, Venn A. | Utility of currently recommended pediatric dyslipidemia classifications in predicting dyslipidemia in adulthood: evidence from the Childhood Determinants of Adult Health (CDAH) Study, Cardiovascular Risk in Young Finns Study, and Bogalusa Heart Study. | Circulation 2008;117(1):32-42 | Background New age- and sex-specific lipoprotein cut points developed from National Health and Nutrition Examination Survey (NHANES) data are considered to be a more accurate classification of a high-risk lipoprotein level in adolescents compared with existing cut points established by the National Cholesterol Education Program (NCEP). The aim of this study was to determine which of the NHANES or NCEP adolescent lipoprotein classifications was most effective for predicting abnormal levels in adulthood.
Methods and Results Adolescent and adult measures of total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglycerides were collected in 365 Australian, 1185 Finnish, and 273 US subjects participating in 3 population-based prospective cohort studies. Lipoprotein variables in adolescence were classified according to NCEP and NHANES cut points and compared for their ability to predict abnormal levels in adulthood. With the use of diagnostic performance statistics (sensitivity, specificity, positive predictive value, negative predictive value, area under receiver operating characteristic curve) in pooled and cohort-stratified data, the NHANES cut points (compared with NCEP cut points) were more strongly predictive of low high-density lipoprotein cholesterol in adults but less predictive of high total cholesterol, high low-density lipoprotein cholesterol, and high triglyceride levels in adults. We identified heterogeneity in the relative usefulness of each classification between cohorts.
Conclusions The separate use of NHANES cut points for high-density lipoprotein cholesterol and NCEP cut points for total cholesterol, low-density lipoprotein cholesterol, and triglycerides yielded the most accurate classification of adolescents who developed dyslipidemia in adulthood. | | Rabito FA, Iqbal S, Holt E, Grimsley LF, Islam TM, Scott SK. | Prevalence of indoor allergen exposures among New Orleans children with asthma. | J Urban Health 2007; 84(6):782-92. | Studies of inner-city asthmatic children have shown significant regional variation in dust allergen exposures. The home environment of asthmatic children in the Gulf South region of the USA has not been characterized.
This study describes indoor dust allergen levels in the homes of 86 asthmatic children in New Orleans and explores regional variability in dust allergen exposure. Data were used from baseline home visits of children in the New Orleans Healthy Homes Initiative. Interview, visual observation, and environmental dust sampling data of 86 children between 4 and 17 years of age were analyzed. Seventy-seven percent of households had moderate (>2.0-9.9 microg/g) or high (> or =10.0 microg/g) levels of either Der p 1 or Der f 1 dust mite allergen and 56.6% had moderate (>2.0-8.0 U/g) or high (>8.0 U/g) levels of cockroach allergen (Bla g 1).
The prevalence of high (>10 microg/g) levels of dog (Can f 1) allergen was 26.5%, and few households (6.0%) had high cat allergen (Fel d 1) levels (>8.0 microg/g). Households with average humidity levels >50% were three times more likely to have elevated dust mite levels (odds ratio = 3.2; 95% confidence interval = 1.1, 9.3; p = 0.03). Home ownership and education level were inversely associated with cockroach and dust mite allergen levels, respectively. Our findings reinforce the evidence of regional variability in dust allergen exposure levels. Asthmatic children living in the Gulf South are exposed to multiple indoor allergen exposures and live in a highly allergenic environment. | | Mzayek F, Hassig S, Sherwin R, Hughes J, Chen W, Srinivasan S, Berenson G. | The association of birth weight with developmental trends in blood pressure from childhood through mid-adulthood: the Bogalusa Heart study. | Am J Epidemiol 2007; 166 (4): 413-20. | Low birth weight has been found to be associated with cardiovascular mortality and morbidity and with an adverse profile of several cardiovascular risk factors. The inverse association between birth weight and blood pressure was consistently reported from many populations. Using longitudinal data from the Bogalusa Heart Study (Louisiana), the authors investigated the association between birth weight and progression of blood pressure through early adulthood, comparing that relation between African Americans and Whites. Birth data of 2,275 participants, screened two or more times in the Bogalusa Heart Study between 1973 and 2001, were retrospectively obtained from birth certificates and were linked to their clinical, laboratory, and socioeconomic and lifestyle data in the Bogalusa Heart Study data sets. Birth weight was inversely associated with systolic blood pressure, diastolic blood pressure, and pulse pressure (p<or=0.01for all). For every 1-kg increase in birth weight, systolic blood pressure dropped by 1.9 mmHg (95% confidence interval: -2.6, -1.3), diastolic blood pressure by 0.7 mmHg (95% confidence interval: -1.2, -0.2), and pulse pressure by 1.2 mmHg (95% confidence interval: -1.7, -0.7). The interaction of birth weight with ethnicity was not significant for any outcome. Birth weight was inversely associated with later blood pressure. The strength of that association did not differ between African Americans and Whites. | | Frontini MG, Srinivasan SR, Xu JH, Tang R, Bond MG, Berenson G. | Utility of non-high-density lipoprotein cholesterol versus other lipoprotein measures in detecting subclinical atherosclerosis in young adults. | Am J Cardiol 2007 Jul 1; 100(1):64-8. | Direct comparative data on the utility of non-high-density lipoprotein (HDL) cholesterol versus low-density lipoprotein cholesterol, HDL cholesterol, triglycerides, apolipoprotein (apo) B, apo A-I, ratio to total cholesterol to HDL cholesterol, and ratio of apo B to apo A-I in detecting increased carotid intima-media thickness (IMT), a validated measurement of subclinical atherosclerosis, in asymptomatic younger adults are scant. This aspect was examined in 1,203 black and white subjects (71% white, 43% men) 24 to 43 years of age. In multivariate logistic regression analysis of each lipoprotein measurement (top quartile vs lower 3 quartiles specific for age, race, and gender) for detecting increased carotid IMT (top decile vs lower 9 deciles specific for age, race, and gender), only non-HDL cholesterol, total cholesterol/HDL cholesterol, and apo B emerged as significant correlates with respective odds ratios of 1.75 (95% confidence interval [CI] 1.10 to 2.78), 2.02 (95% CI 1.27 to 3.19), and 2.13 (95% CI 1.38 3.29), after adjusting for body mass index, systolic blood pressure, and other lipoprotein measurements. Regarding discriminating values of different lipoprotein measurements in detecting increased carotid IMT, area (c-value) under the receiver operating characteristic curve analysis for each lipoprotein measurement adjusted for age, race, gender, body mass index, and systolic blood pressure indicated that the c-value for non-HDL cholesterol (0.73) was similar to those for low-density lipoprotein cholesterol (0.76), total cholesterol/HDL cholesterol (0.72), apo B/apo A-I (0.71), and HDL cholesterol (0.70), but significantly (p <0.001) higher than that for apo A-I (0.69), triglycerides (0.64), and apo B (0.64). In conclusion, non-HDL cholesterol is as good as or better than other widely recommended lipoprotein measurements in the identification of subclinical atherosclerosis in young adults. | | Kissinger P, Schmidt N, Sanders C, Liddon N. | The effect of the Hurricane Katrina disaster on sexual behavior and access to reproductive care for young women in New Orleans. | Sex Transm Dis 2007. | Objective: The Hurricane Katrina disaster caused rapid displacement of over a million persons in metropolitan New Orleans. The purpose of this study was to describe changes in sexual behavior and access to reproductive care pre- and post-rapid displacement among a cohort of young women receiving family planning services before displacement.
Methods: Women 16 to 24 years old, who were attending 2 public family planning clinics and enrolled in a vaginal douching prevention study, were located 5 to 6 months after Katrina and interviewed by telephone to elicit information about sexual behavior and access to reproductive care.
Results: Women who were located were interviewed (N = 55). Of these, 96% were black, 62% were employed before the disaster, and the mean age was 22.1 (SD 2.1). In the 5 to 6 months after disaster, 86% lived in 3 or more places, 31% had returned to New Orleans, 17% needed health care but could not access it, 40% had not used birth control, and 2 (4%) experienced an unintended pregnancy as a result of lack of access to care. When compared with baseline, after the hurricane, women were less likely to have attended family planning services, to have used birth control, to have >1 sex partner, to have a vaginal odor or discharge.
Conclusion: Relief efforts for disasters causing rapid displacement of impoverished women should include reproductive care such as provision of contraception, condoms, and STI services, as well as linking women back into care. | | Xiong X, Buekens P, Vastardis S, Yu S. | Peridontal disease and pregnancy outcomes: state-of-the-science. | Obstet Gynecol Surv Sept 2007;62(9):605-615. | To examine the existing evidence on the relationship between periodontal disease and adverse pregnancy outcomes, we conducted a systematic review of studies published up to December 2006. Studies published in full text were identified by searching computerized databases (e.g., MEDLINE, EMBASE). A meta-analysis was performed to pool the effect size of the clinical trials. Forty-four studies were identified (26 case-control studies, 13 cohort studies, and 5 controlled trials). The studies focused on preterm low birth weight, low birth weight, preterm birth, birth weight by gestational age, miscarriage or pregnancy loss, preeclampsia, and gestational diabetes mellitus. Of the chosen studies, 29 suggested an association between periodontal disease and increased risk of adverse pregnancy outcome (odds ratios [ORs] ranging from 1.10 to 20.0) and 15 found no evidence of an association (ORs ranging from 0.78 to 2.54). A meta-analysis of the clinical trials suggested that oral prophylaxis and periodontal treatment may reduce the rate of preterm low birth weigh(pooled risk ratio (RR): 0.53, 95%confidence interval [CI]: 0.30-0.95, P < 0.05), but did not significantly reduce the rates of preterm birth (pooled RR: 0.79, 95% CI: 0.55-1.11, P > 0.05) or low birth weight (pooled RR: 0.86, 95% CI: 0.58-1.29, P > 0.05). The authors conclude that periodontal disease may be associated with increased risk of adverse pregnancy outcomes. More methodologically rigorous studies are needed in this field. Currently, there is insufficient evidence to support the provision of periodontal treatment during pregnancy for the purpose of reducing adverse pregnancy outcomes. | | Chen W, Srinivasan S, Li S, Xu J, Berenson G. | Clustering of long-term trends in metabolic syndrome variables from childhood to adulthood in Blacks and Whites: the Bogalusa heart study. | Am J Epidemiol Sept 2007;166(5):527-533. | Clustering of long-term rates of change in metabolic syndrome variables (body mass index, homeostasis model assessment of insulin resistance, ratio of triglycerides to high-density lipoprotein cholesterol, and mean arterial pressure) from childhood to adulthood was evaluated longitudinally (1982-2003) in a cohort of 389 Blacks and 631 Whites who were examined 3-6 times both as children (ages 4-17 years) and as adults (ages 18-38 years) over an average of 16 years (3,874 observations). The incremental area under the growth curve was used as a measure of long-term rates of change in risk variables since childhood. Intraclass correlations, a measure of the degree of clustering, among the four variables were significant (p < 0.001) for childhood, adulthood, and incremental area values and were higher in adulthood than in childhood. Blacks showed a higher degree of clustering of long-term rates of change in risk variables than did Whites. Adjustment for body mass index reduced the degree of clustering by approximately 50%. These results show that metabolic syndrome variables coexist in terms not only of their levels in childhood and adulthood but also of long-term rates of change. Obesity is of critical importance in the development of metabolic syndrome, and its prevention beginning in childhood needs to be addressed. | | Clark R, Theall K, Amedee A, Dumestre J, Wenthold L, Kissinger P | Lack of association between genital tract HIV-1 RNA shedding and hormonal contraceptive use in a cohort of Louisiana women. | Sex Transm Dis 2007. | | | Chen J, Gu D, Chen CS, Wu X, Hamm LL, Muntner P, Batuman V, Lee CH, Whelton PK, He J | Association between the metabolic syndrome and chronic kidney disease in Chinese adults. | Nephrol Dial Transplant Apr 2007. 22(4):1100-6 | Background: The metabolic syndrome is a common risk factor for cardiovascular and chronic kidney disease (CKD) in Western populations. We examined the relationship between the metabolic syndrome and risk of CKD in Chinese adults.
Methods: A cross-sectional survey was conducted in a nationally representative sample of 15 160 Chinese adults aged 35-74 years. The metabolic syndrome was defined as the presence of three or more of the following risk factors: elevated blood pressure, low high density lipoprotein (HDL)-cholesterol, high triglycerides, elevated plasma glucose and abdominal obesity. CKD was defined as an estimated glomerular filtration rate<60 ml/ min/ 1.73 m2 and elevated serum creatinine was defined as >or=1.14 mg/dl in men and >or=0.97 mg/dl in women (>or=95th percentile of serum creatinine in Chinese men and women aged 35-44 years without hypertension or diabetes, respectively).
Results: The multivariate-adjusted odds ratios [95% confidence interval (CI)] of CKD and elevated serum creatinine in participants with compared to those without the metabolic syndrome were 1.64 (1.16, 2.32) and 1.36 (1.07, 1.73), respectively. Compared to participants without any components of the metabolic syndrome, the multivariate-adjusted odds ratios (95% CI) of CKD were 1.51 (1.02, 2.23), 1.50 (0.97, 2.32), 2.13 (1.30, 3.50) and 2.72 (1.50, 4.93) for those with 1, 2, 3, and 4 or 5 components, respectively. The corresponding multivariate-adjusted odds ratios (95% CI) of elevated serum creatinine were 1.11 (0.88, 1.40), 1.39 (1.07, 2.04), 1.47 (1.06, 2.04) and 2.00 (1.32, 3.03), respectively.
Conclusions: These findings suggest that the metabolic syndrome might be an important risk factor for CKD in Chinese adults. | | Patel DA, Srinivasan SR, Xu JH, Chen W, Berenson GS | Persistent elevation of liver function enzymes within the reference range is associated with increased cardiovascular risk in young adults: the Bogalusa Heart Study. | Metabolism Jun 2007. 56(6):792-8 | Elevations in alanine aminotransferase (ALT) and gamma-glutamyl transferase (GGT), markers of liver dysfunction and nonalcoholic fatty liver, are considered as part of the metabolic syndrome and related diseases. However, information is limited regarding the persistence (tracking) in levels of these enzymes over time and their influence on cardiovascular (CV) risk in young adults. The study sample consisted of white and black subjects (N = 489, 40% male, 73% white; baseline age, 18-32 years) followed over a period of 12 years as part of the Bogalusa Heart Study, with repeat measurements of CV risk factor variables and liver enzymes. Both at baseline and follow-up, males vs females had higher ALT (P < .01 to .0001) and GGT (P < .0001); blacks vs whites had higher GGT (P < .0001). With respect to persistence in enzyme levels over time, of those individuals who had ALT and GGT at the top quintile specific for age, race, and sex at baseline, about 50% of them continued to remain so with high values after 12 years. Individuals with levels persistently in the highest quintile vs those in the lowest quintile showed higher (P <.0001) body mass index, waist circumference, triglycerides, low-density lipoprotein cholesterol, glucose, insulin, insulin resistance index, and systolic and diastolic blood pressures; lower (P < .0001) high-density lipoprotein cholesterol; and higher (P < .05 to .001) prevalence of obesity, hypertension, dyslipidemia, metabolic syndrome as defined by the National Cholesterol Education Program Adult Treatment Panel III, positive parental history of type 2 diabetes, and coronary heart disease. In addition, based on a multivariate analysis using 2 separate models for ALT and GGT, baseline levels of both enzymes were independent predictors of follow-up; insulin resistance index and baseline GGT were also predictive of follow-up systolic blood pressure. Elevations in liver enzymes ALT and GGT, within "reference" range, persist over time and relate to clinically relevant adverse CV risk profile in young adults. | | Xiong X, Beukens P, Pridjian G, Fraser WD | Pregnancy-induced hypertension and perinatal mortality | J Reprod Med May 2007. 52(5):402-6 | Objective: To examine the association between pregnancy-induced hypertension (PIH) and perinatal mortality.
Study Design: A population-based, retrospective, cohort study was conducted based on 16,936 pregnancies delivered between January 1, 1989, and December 31, an infant 1990, in Suzhou, China. PIH growth was classified as gestational hypertension, preeclampsia or severe preeclampsia.
Results: The perinatal mortality was 10.2 per thousand in normotensive women, 10.3 per thousand in women with gestational hypertension, 17.8 per thousand in women with preeclampsia and 37.0 per thousand in women with severe preeclampsia. Severe preeclampsia was associated with 3.4-fold increased perinatal mortality. After stratifying by intrauterine growth restriction status, if infants were not intrauterine growth restricted, all types of PIH were not associated with increased perinatal mortality. However, when infants were intrauterine growth restricted, all types of PIH were associated with markedly increased perinatal mortality (e.g., 15-fold increased mortality for severe preeclampsia).
Conclusion: Intrauterine growth restriction secondary to PIH is associated with significantly increased perinatal mortality. | | Clark R, Theall K, Amedee A, Kissinger P | Frequent douching and clinical outcomes among HIV-infected women | Sex Transm Dis 2007. | Objective: To determine the prevalence of douching among a cohort of HIV-infected women and to examine clinical outcomes associated with frequent douching-namely bacterial vaginosis, presence of a sexually-transmitted infections, and genital tract HIV-1 RNA shedding.
Study Design: Participants included a concurrent cohort of 187 women attending an HIV outpatient clinic in New Orleans, LA. Subjects underwent clinical examinations and answered questions in a computer-assisted survey at each visit.
Results: At baseline, 1-, and 3-month follow-ups, 64.2%, 56.5%, and 54.7% of women, respectively, indicated that they douched. In multivariable analyses, douching >1 time a month was independently associated with the outcomes of bacterial vaginosis and presence of a selected sexually transmitted infection (Trichomonas vaginalis, Neisseria gonorrhea, or Chlamydia trachomatis). Although not significant, women who douched >1 time a month were also twice as likely to have genital tract HIV-1 RNA shedding as nondouchers.
Conclusions: This is the first study performed in women infected with HIV to link a significant dose-response relationship between douching and the clinical outcomes of bacterial vaginosis and presence of a sexually transmitted infection, and to examine the association between douching and genital tract HIV-1 RNA shedding. | | Kissinger P, Schmidt N, Sanders C, Liddon N | The Effect of the Hurricane Katrina Disaster on Sexual Behavior and Access to Reproductive Care for Young Women in New Orleans | Sex Transm Dis 2007. | Objective: The Hurricane Katrina disaster caused rapid displacement of over a million persons in metropolitan New Orleans. The purpose of this study was to describe changes in sexual behavior and access to reproductive care pre- and postrapid displacement among a cohort of young women receiving family planning services before displacement.
Methods: Women 16 to 24 years old, who were attending 2 public family planning clinics and enrolled in a vaginal douching prevention study, were located 5 to 6 months after Katrina and interviewed by telephone to elicit information about sexual behavior and access to reproductive care.
Results: Women who were located were interviewed (N = 55). Of these, 96% were black, 62% were employed before the disaster, and the mean age was 22.1 (SD 2.1). In the 5 to 6 months after disaster, 86% lived in 3 or more places, 31% had returned to New Orleans, 17% needed health care but could not access it, 40% had not used birth control, and 2 (4%) experienced an unintended pregnancy as a result of lack of access to care. When compared with baseline, after the hurricane, women were less likely to have attended family planning services, to have used birth control, to have >1 sex partner, to have a vaginal odor or discharge.
Conclusion: Relief efforts for disasters causing rapid displacement of impoverished women should include reproductive care such as provision of contraception, condoms, and STI services, as well as linking women back into care. | | Bazzano L, Khan Z, Reynolds K, He J | Effect of nocturnal nasal continuous positive airway pressure on blood pressure in obstructive sleep apnea | Hypertension Aug 2007. 50(2):417-423 | Obstructive sleep apnea (OSA) is a very common risk factor for hypertension, and continuous positive airway pressure (CPAP) has been widely used to treat OSA. We conducted a meta-analysis of randomized, controlled trials to evaluate the effects of CPAP on blood pressure, reported as either a primary or secondary end point, among patients with OSA. Studies were retrieved by searching Medline (January 1980 to July 2006), the Cochrane Database of Systematic Reviews, conference abstracts, and bibliographies of review and original articles. From 255 relevant reports, 16 randomized clinical trials were selected that compared CPAP to control among participants with OSA, had a minimum treatment duration of 2 weeks, and reported blood pressure changes during the intervention or control period. Data on sample size, participant characteristics, study design, intervention methods, duration, and treatment results were independently abstracted by 2 investigators using a standardized protocol. Data from 16 trials representing 818 participants were examined using a random-effects model. Mean net change in systolic blood pressure for those treated with CPAP compared with control was -2.46 mm Hg (95% CI: -4.31 to -0.62); mean net change in diastolic blood pressure was -1.83 mm Hg (95% CI: -3.05 to -0.61); and mean net change in mean arterial pressure was -2.22 mm Hg (95% CI: -4.38 to -0.05). Net reductions in blood pressure were not statistically different between daytime and nighttime. These results indicate that CPAP decreases blood pressure among those with OSA and may help prevent hypertension. | | Yang W, Kelly T, He J | Genetic epidemiology of obesity | Epidemiol Rev Aug 2007. 29(1):49-61 | Obesity has become a global epidemic and contributes to the increasing burden of type 2 diabetes, cardiovascular disease, stroke, some types of cancer, and premature death worldwide. Obesity is highly heritable and arises from the interactions of multiple genes, environmental factors, and behavior. In this paper, the authors reviewed recent developments in genetic epidemiologic research, focusing particularly on several promising genomic regions and obesity-related genes. Gene-gene and gene-environment interactions of obesity were also discussed. Published studies were accessed through the MEDLINE database. The authors also searched the Obesity Gene Map Database( http://obesitygene.pbrc.edu/) and conducted a manual search using references cited in relevant papers. Heritabilities for obesity-related phenotypes varied from 6% to 85% among various populations. As of October 2005, 253 quantitative trait loci for obesity-related phenotypes have been localized in 61 genome-wide linkage scans, and genetic variants in 127 biologic candidate genes have been reported to be associated with obesity-related phenotypes from 426 positive findings. Gene-gene interactions were also observed in several genes, and some genes were found to influence the effect of dietary intake and physical activity on obesity-related phenotypes. Integration of genetic epidemiology with functional genomics and proteomics studies will be required to fully understand the role of genetic variants in the etiology and prevention of obesity. | | Belancio Vp, Whelton M, Deininger P | Requirements for polyadenylation at the 3' end of LINE-1 elements | Gene 1 Apr 2007. 390(1-2):98-107 | LINE-1 (L1) is the only active, autonomous, non-LTR, human retroelement. There are about 5x10(5) L1 copies in the human genome, the majority of which are truncated at their 5' ends. Both truncated and full-length L1 insertions contain a polyadenylation (polyA) signal at their 3' ends. A typical polyA site consists of the three main cis-acting elements: a conserved hexamer, cleavage site, and a GU-rich downstream region. A newly inserted L1 copy contains the conserved AATAAA hexamer at the end of its sequence. However, the GU-rich downstream region has to be provided by the neighboring genomic sequences and therefore it would vary for every L1 copy. Using northern blot analysis of transiently transfected L1 expression vectors we demonstrate that L1 elements contain sequences that allow efficient polyadenylation at the L1 3' end upon retrotransposition into a new genomic location independent of the base composition downstream of the insertion site. The strategy of polyadenylation at the 3' end of L1 parallels the approach the element employs at its 5'UTR by having an unusual internal polymerase II promoter, making new insertions less dependent on the properties of the flanking sequences at the new locus. | | Gasior SL, Preston G, Hedges DJ, Gilbert N, Moran JV, Deininger PL | Characterization of pre-insertion loci of de novo L1 insertions | Gene 1 Apr 2007. 390(1-2):190-8 | The human Long Interspersed Element-1 (LINE-1, L1) and the Short Interspersed Element (SINE) Alu comprise 28% of the human genome. They share the same L1-encoded endonuclease for insertion, which recognizes an A+T-rich sequence. Under a simple model of insertion distribution, this nucleotide preference would lead to the prediction that the populations of both elements would be biased towards A+T-rich regions. Genomic L1 elements do show an A+T-rich bias. In contrast, Alu is biased towards G+C-rich regions when compared to the genome average. Several analyses have demonstrated that relatively recent insertions of both elements show less G+C content bias relative to older elements. We have analyzed the repetitive element and G+C composition of more than 100 pre-insertion loci derived from de novo L1 insertions in clustered human cancer cells, which should represent an evolutionary unbiased set of insertions. An A+T-rich bias is observed in the 50 bp flanking the endonuclease target sites, consistent with the known target site for the L1 endonuclease. The L1, Alu, and G+C content of 20 kb of the de novo pre-insertion loci shows a different set of biases than that observed for fixed L1s in the human genome. In contrast to the insertion sites of genomic L1s, the de novo L1 pre-insertion loci are relatively L1-poor, Alu-rich, and G+C neutral. Finally, a statistically significant cluster of de novo L1 insertions was localized in the vicinity of the c-myc gene. These results suggest that the initial insertion preference of L1, while A+T-rich in the initial vicinity of the break site, can be influenced by the broader content of the flanking genomic region and have implications for understanding the dynamics of L1 and Alu distribution in the human genome. | | Menke A, Muntner P, Wildman RP, Reynolds K, He J | Measures of adiposity and cardiovascular disease risk factors | Obesity Mar 2007. 15(3):785-95 | Objective To determine which of five measures of adiposity maintains the strongest association with cardiovascular disease risk factors. Research Methods and Procedures A nationally representative sample of 12,608 adult participants of the third National Health and Nutrition Examination Survey were examined. Waist circumference, total body fat, percent body fat, BMI, and skinfold thickness were measured following a standardized protocol. Results In multivariable adjusted models including waist circumference and BMI as independent variables, waist circumference was a significantly better predictor. The odds ratios (95% confidence intervals) for each standard deviation higher waist circumference and BMI for men were as follows: 1.88 (1.43, 2.48) and 0.99 (0.76, 1.29), respectively, for hypertension; 1.51 (0.87, 2.59) and 1.23 (0.76, 1.99), respectively, for diabetes; and 1.85 (1.48, 2.32) and 1.00 (0.80,1.24), respectively for low high-density lipoprotein-cholesterol. The analogous odds ratios (95% confidence intervals) for women were as follows: 2.28 (1.74, 3.00) and 0.91 (0.69, 1.19), respectively, for hypertension; 2.72 (1.85, 4.00) and 0.82 (0.55, 1.23), respectively, for diabetes; and 1.90 (1.47, 2.47) and 1.07 (0.83,1.38), respectively for low high-density lipoprotein-cholesterol. Results were markedly similar for waist circumference in models adjusting for total body fat, percent body fat, and skinfold thickness separately. In contrast, waist circumference was not a significantly better predictor of elevated C-reactive protein than the other measures of adiposity. Discussion Waist circumference maintains a stronger association with cardiovascular disease risk factors than other measures of adiposity. | | Rabito FA, Iqbal S, Shorter CF, Osman P, Philips PE, Langlois E | The association between demolition activity and children's blood lead levels | Environmental Research Mar 2007. 103(3):345-51 | Urban renewal efforts are a priority for many American cities. As efforts to reconstitute urban centers increase, the demolition of old, deteriorated structures has accelerated. Recent studies have identified demolitions as a potential source of environmental lead exposure. We conducted a study examining the relationship between demolition activity and blood lead levels of children residing in neighborhoods where demolition activity occurred. A retrospective cohort study was conducted in St. Louis City, Missouri. The study period was January 1, 2002 to December 31, 2002. Data were obtained from the Missouri Childhood Lead Poisoning Prevention Program's (CLPPP) lead surveillance system and St. Louis Demolition Permit Database. Children were considered exposed to a demolition if they had a blood lead test within 45 days of any demolition on a census block. Exposure was classified as both a dichotomous (yes/no) and a categorical (none/one/multiple) variable and was analyzed separately. Linear regression models were developed to determine effects of demolitions on blood lead levels. A total of 1196 children 6-72 months of age living in 395 census blocks were included. 314 (26.3%) were exposed and 882 (73.7%) were unexposed to a demolition. In an adjusted model, exposure to multiple demolitions was found to have significant effects on children blood lead levels (coefficient=0.281; 95% CI=0.069, 0.493; P-value=0.010). Age of the child, race, and age of housing where children resided were also significant predictors. This study suggests that multiple demolitions within a census block may significantly increase children's blood lead levels. The findings may be useful to municipal planners in older cities where demolitions are being used as an urban renewal tool. | | Hedges DJ, Deininger PL | Inviting instability: transposable elements, double-strand breaks, and the maintenance of genome integrity | Mutation Research. 1 Mar 2007. 616(1-2):46-59 | The ubiquity of mobile elements in mammalian genomes poses considerable challenges for the maintenance of genome integrity. The predisposition of mobile elements towards participation in genomic rearrangements is largely a consequence of their interspersed homologous nature. As tracts of nonallelic sequence homology, they have the potential to interact in a disruptive manner during both meiotic recombination and DNA repair processes, resulting in genomic alterations ranging from deletions and duplications to large-scale chromosomal rearrangements. Although the deleterious effects of transposable element (TE) insertion events have been extensively documented, it is arguably through post-insertion genomic instability that they pose the greatest hazard to their host genomes. Despite the periodic generation of important evolutionary innovations, genomic alterations involving TE sequences are far more frequently neutral or deleterious in nature. The potentially negative consequences of this instability are perhaps best illustrated by the >25 human genetic diseases that are attributable to TE-mediated rearrangements. Some of these rearrangements, such as those involving the MLL locus in leukemia and the LDL reception in familial hypercholesterolemia, represent recurrent mutations that have independently arisen multiple times in human populations. While TE-instability has been a potent force in shaping eukaryotic genomes and a significant source of genetic disease, much concerning the mechanisms governing the frequency and variety of these events remains to be clarified. Here we survey the current state of knowledge regarding the mechanisms underlying mobile element-based genetic instability in mammals. Compared to simpler eukaryotic systems, mammalian cells appear to have several modifications to their DNA-repair ensemble that allow them to better cope with the large amount of interspersed homology that has been generated by TEs. In addition to the disruptive potential of nonallelic sequence homology, we also consider recent evidence suggesting that the endonuclease products of TEs may also play a key role in instigating mammalian genomic instability. | | Harrison SR, Toriello P, Pavluck A, Ellis R, Pedersen E, Gaienne R, Kissinger P | The impact of a brief induction on short-term continuation in a therapeutic community | Am J of Drug & Alcohol Abuse. 2007. 33(1):147-53 | Continuation in substance abuse treatment is one of the strongest predictors of successful post-treatment outcomes across all major treatment modalities. However, since rates of attrition are highest within the first month of treatment, many clients drop out before these positive outcomes are realized. The impact of organizational and therapeutic factors on treatment continuation in therapeutic communities has received little attention in the literature. This study was conducted to determine whether a brief induction to treatment was associated with improved treatment continuation in a therapeutic community. Multivariable logistic regression analysis indicated that induction was associated with 30-day continuation. Prior treatment and court-mandated treatment were also associated with continuation. | | Theall KP, Clark RA, Powell A, Smith H, Kissinger P | Alcohol consumption, ART usage and high-risk sex among women infected with HIV | AIDS & Behavior. Mar 2007. 11(2):205-15 | We examine the role of alcohol consumption on sexual risk behavior among a cohort of 187 sexually active HIV-infected women (aged 18-61) in care at an urban ambulatory clinic in New Orleans, Louisiana, U.S. Sexual risk behavior among women on and off antiretroviral therapy (ART) and the relationship between alcohol use, ART, and behavior was also explored. One-fourth of respondents were classified as binge drinkers, and the average number of drinking occasions per week ranged from none to 10-12. Approximately 60% were prescribed ART, and self-reported adherence was 90%. One-third of the women reported no condom use at last vaginal sex, 62% reported inconsistent condom use for vaginal sex, and 7% had multiple male sex partners in the last month. Binge alcohol users and women on ART were significantly more likely to participate in each sexual risk outcome examined. Partner refusal of condom use was also significantly associated with binge drinking patterns. Results lend strength to the equivocal literature on the relationship between both alcohol and prescription of ART and sexual behavior. Enhanced detection of alcohol abuse, coupled with risk reduction counseling especially among women prescribed ART are important clinical practices in treating women with HIV. | | Gu D, Wildman RP, Wu X, Reynolds K, Huang J, Chen CS, He J | Incidence and predictors of hypertension over 8 years among Chinese men and women | Journal of Hypertension. Mar 2007. 25(3):517-523 | Objective To determine the 8-year incidence of hypertension and its risk factors among Chinese adults Methods A population-based sample of 10,525 Chinese adults aged >=40 years and free from hypertension at baseline was followed up from 1991 to 1999-2000. Incident hypertension was defined as systolic pressure >=140 mmHg, diastolic pressure >=90 mmHg, or current use of antihypertensive medication. Results Over a mean of 8.2 years of follow-up, 28.9% of men and 26.9% of women developed hypertension. Among men, independent predictors of incident hypertension were baseline age [relative risk (RR) per 5 years: 1.10; 95% confidence interval (CI): 1.07, 1.13], living in urban regions versus rural regions (RR: 0.74; 95% CI: 0.64, 0.85), alcohol drinking versus non-drinking (RR: 1.13; 95% CI: 1.02, 1.24), prehypertension versus normotension (RR: 1.70; 95% CI: 1.53, 1.88), heart rate (RR of third versus first tertile: 1.27; 95% CI: 1.13, 1.44), body mass index (RR of third versus first tertile: 1.28; 95% CI: 1.12, 1.46), and low versus high physical activity (RR: 1.27; 95% CI: 1.10, 1.47). Results were similar for women, with current smoking in place of alcohol drinking and opposite results for region. The population-attributable risk of modifiable risk factors was between 25 and 50%. Conclusions These data indicate that the incidence of hypertension is high among these Chinese adults, and suggest that 25-50% of new hypertension cases could be prevented with risk factor modification. Given the excess cardiovascular mortality associated with hypertension, these data call for urgent improvements in hypertension prevention and control programs in China. | | Xiong X, Wightkin J, Magnus JH, Pridjian G, Acuna JM, Buekens P | Birth weight and infant growth: optimal infant weight gain versus optimal infant weight | Maternal & Child H J. Jan 2007. 11(1):57-63 | Objective Infant growth assessment often focuses on "optimal" infant weights and lengths at specific ages, while de-emphasizing infant weight gain. The objective of this study was to examine infant growth patterns by measuring infant weight gain relative to birth weight. Methods We conducted this study based on data collected in a prospective cohort study including 3,302 births with follow up examinations of infants between the ages of 8 and 18 months. All infants were participants in the Louisiana State Women, Infants, and Children Supplemental Food Program between 1999 and 2001. Growth was assessed by infant weight gain percentage (IWG%, defined as infant weight gain divided by birth weight) as well as by mean z-scores and percentiles for weight-for-age, length-for-age, and weight-for-length calculated based on growth charts published by the U.S. Centers for Disease Control (CDC). Results An inverse relationship was noted between birth weight category and IWG% (from 613.9% for infants with birth weights >1500 g to 151.3% for infants with birth weights of 4000 g or more). In contrast, low birth weight infants had lower weight-for-age, weight-for-length z-scores and percentiles compared to normal birth weight infants according to CDC growth charts. Conclusions Although low birth weight infants had lower anthropometric measures compared to a national reference population, they had significant catch-up growth. We suggest that growth assessments should compare infants' anthropometric data to their own previous growth measures as well as to a reference population. Further studies are needed to identify optimal ranges of infant weight gain. | | Johnson HM, Douglas PS, Srinivasan SR, Bond MG, Tang R, Li S, Chen W, Berenson GS, Stein J | Predictors of carotid intima-media thickness progression in young adults: the Bogalusa Heart Study | Stroke. 2007. 38:900 | Background and Purpose We sought to evaluate the predictors of carotid intima-media thickness (CIMT) progression in young adults and to determine whether they differed between the sexes. Although risk factors for the progression of atherosclerosis in middle-aged and elderly adults are well known, they are less well understood in young adults. CIMT is a validated measure of subclinical atherosclerosis. Methods B-mode ultrasound images of the far walls of both carotid arteries were obtained in 336 young adults in the Bogalusa Heart Study, whose mean+/-SD age was 32.3+/-3.0 years. CIMT and risk factors were measured at baseline (1995-1996) and after 5.8+/-0.6 years. Multivariable regression was used to determine the predictors of CIMT progression. Results CIMT progression rates in women (0.015+/-0.024 mm/y) and men (0.020+/-0.027 mm/y) were not statistically different after controlling for body mass index (p=0.155). Smoking was a statistically significant predictor of common and composite CIMT progression in both sexes. In men, systolic blood pressure was an independent predictor of internal carotid and composite CIMT progression, fasting glucose predicted common CIMT progression, and family history predicted composite CIMT progression. Conclusions In young adults, smoking was a consistent predictor of short-term CIMT progression in men and women. Traditional risk factors also predicted CIMT progression in men. | | Freedman DS, Mei Z, Srinivasan SR, Berenson GS, Dietz WH | Cardiovascular risk factors and excess adiposity among overweight children and adolescents: the Bogalusa Heart Study | J Pediatrics. Jan 2007. 150(1):12-17 | Objective To explore the accuracy of various body mass index (BMI) cutpoints in identifying children who have excess adiposity (based on skin fold thicknesses), adverse levels of lipids, insulin, and blood pressures and a high risk for severe adult obesity. Study Design Cross-sectional (n=10,099) and longitudinal (n=2392) analyses were performed among subjects who participated in the Bogalusa Heart Study. Results Of children with a BMI <=95th percentile (P) of the Centers for Disease Control (CDC) growth charts, 39% had at least two risk factors, 65% had excess adiposity, and 65% had an adult BMI of <=35 kg/m2. Of those with a BMI <=99th P, 59% had at least two risk factors, 94% had excess adiposity, and 88% had an adult BMI of <=35 kg/m2. About 4% of children in the US now have a BMI <=99th P. Conclusions The 99th P of BMI-for-age may be appropriate for identifying children who are at very high risk for biochemical abnormalities and severe adult obesity. More aggressive weight control strategies may be warranted for this subgroup. | | Bazzano LA, Reynolds K, Holder KN, He J | Effect of folic acid supplementation on risk of cardiovascular diseases: a meta-analysis of randomized controlled trials | JAMA. Dec 2006. 296(22):2720-6 | Context Epidemiologic studies have suggested that folate intake decreases risk of cardiovascular diseases. However, the results of randomized controlled trials on dietary supplementation with folic acid to date have been inconsistent. Objective To evaluate the effects of folic acid supplementation on risk of cardiovascular diseases and all-cause mortality in randomized controlled trials among persons with preexisting cardiovascular or renal disease. Data Sources Studies were retrieved by searching MEDLINE (January 1966-July 2006) using the Medical Subject Headings cardiovascular disease, coronary disease, coronary thrombosis, myocardial ischemia, coronary stenosis, coronary restenosis, cerebrovascular accident, randomized controlled trial, clinical trials, homofolic acid, and folic acid, and the text words folic acid and folate. Bibliographies of all retrieved articles were also searched, and experts in the field were contacted. Study Selection From 165 relevant retrieved reports, 12 randomized controlled trials compared folic acid supplementation with either placebo or usual care for a minimum duration of 6 months and with clinical cardiovascular disease events reported as an end point. Data Extraction Data on study design, characteristics of participants, changes in homocysteine levels, and cardiovascular disease outcomes were independently abstracted by 2 investigators using a standardized protocol. Data Synthesis Studies including data from 16, 958 participants with preexisting vascular disease were analyzed using a random-effects model. The overall relative risks (95% confidence intervals) of outcomes for patients treated with folic acid supplementation compared with controls were 0.95 (0.88-1.03) for cardiovascular diseases, 1.04 (0.92-1.17) for coronary heart disease, 0.86 (0.71-1.04) for stroke, and 0.96 (0.88-1.04) for all-cause mortality. The relative risk was consistent among participants with preexisting cardiovascular or renal disease. Conclusions Folic acid supplementation has not been shown to reduce risk of cardiovascular diseases or all-cause mortality among participants with prior history of vascular disease. Several ongoing trials with large sample sizes might provide a definitive answer to this important clinical and public health question. | | Xiong X, Buekens P, Vastardis S, Wu T | Periodontal disease as one possible explanation for the Mexican paradox | Medical Hypothesis. 2006. 67(6):1348-54 | Mexican-American women have similar low socioeconomic status as compared to non-Hispanic blacks. However, Mexican-American women have consistently been shown to have a lower rate of low birth weight births as compared to non-Hispanic blacks and similar to non-Hispanic whites. This phenomenon is referred to as the "Mexican paradox", and the explanation for this is still unclear. We used data from the third US National Health and Nutrition Examination Survey (NHANES III) to compare the rate of periodontal disease in non-Hispanic black, non-Hispanic white, and Mexican-American pregnant and nonpregnant women. We found that Mexican-American women have a lower rate of periodontal disease before and during pregnancy when compared to non-Hispanic blacks. Since periodontal disease has been associated with an increased risk of preterm birth and low birth weight, we hypothesize that the lower prevalence of periodontal disease before and during pregnancy among Mexican-American women may contribute to the "Mexican paradox". | | Galassi A, Reynolds K, He J | Metabolic syndrome and risk of cardiovascular disease: a meta-analysis | American Journal of Medicine. Oct 2006. 119(10): 812-9 | Purpose The use of different definitions of the metabolic syndrome has led to inconsistent results on the association between the metabolic syndrome and risk of cardiovascular disease. We examined the association between the metabolic syndrome and risk of cardiovascular disease. Methods A MEDLINE search (1966-April 2005) was conducted to identify prospective studies that examined the association between the metabolic syndrome and risk of cardiovascular disease. Information on sample size, participant characteristics, metabolic syndrome definition, follow-up duration, and endpoint assessment was abstracted. Results Data from 21 studies met the inclusion criteria and were included. Individuals with the metabolic syndrome, compared to those without, had an increased mortality from all causes (relative risk [RR] 1.35; 95% confidence interval [CI], 1.17-1.56) and cardiovascular disease (RR 1.74; 95% CI, 1.29-2.35); as well as an increased incidence of cardiovascular disease (RR 1.53; 95% CI, 1.26-1.87), coronary heart disease (RR 1.52; 95% CI, 1.37-1.69) and stroke (RR 1.76; 95% CI, 1.37-2.25). The relative risk of cardiovascular disease associated with the metabolic syndrome was higher in women compared with men and higher in studies that used the World Health Organization definition compared with studies that used the Adult Treatment Panel III definition. Conclusion This analysis strongly suggests that the metabolic syndrome is an important risk factor for cardiovascular disease incidence and mortality, as well as all-cause mortality. The detection, prevention, and treatment of the underlying risk factors of the metabolic syndrome should become an important approach for the reduction of the cardiovascular disease burden in the general population. | | Xiong X, Buekens P, Vastardis S, Pridjian G | Periodontal disease and gestational diabetes mellitus. | American Journal of Obstetrics & Gynecology. Oct 2006. 195(4):1086-1089 | Objective We examined the relationship between periodontal disease and different types of diabetes in pregnant and nonpregnant women. Study Design This study was based on the data from the third National Health and Nutrition Examination Survey (NHANES III), including 256 pregnant and 4234 nonpregnant women. Women were classified into those with gestational diabetes mellitus (GDM) in current pregnancy, with GDM in previous pregnancy, and with type 1 or 2 diabetes. Results In pregnant women, the prevalence of periodontitis was 44.8% in women with GDM and 13.2% in nondiabetic women, with adjusted odds ratio (aOR) of 9.11 (95% confidence interval [CI] 1.11-74.9). In nonpregnant women, the prevalence of periodontitis was 40.3% in women with type 1 or 2 diabetes, 25.0% in women with previous history of GDM, and 13.9% in nondiabetic women, with aOR of 2.76 (1.03-7.35) for women with type 1 or 2 diabetes. Conclusion We found an association between periodontal disease and GDM. | | Li H, Srinivasan SR, Berensen GS | Comparison of the measures of pulsatile arterial function between asymptomatic younger adult smokers and former smokers: the Bogalusa Heart Study | Am J of Hypertension. Sep 2006. 19(9):897-901 | Cigarette smoking, an established cardiovascular (CV) disease risk factor, is known to impair pulsatile arterial function. However, information is scant in this regard on asymptomatic younger adult former smokers. As part of the Bogalusa Heart Study, the pulsatile arterial function was examined noninvasively in 278 nonsmokers, 277 current smokers, and 104 former smokers, aged 18 to 44 years, mean 36.4 years by radial artery pressure pulse contour analysis. Compared to current smokers, former smokers had higher body mass index (BMI, 29.6 v 27.7 kg/m2, P=0.02), after adjusting for age, ethnicity, and sex, and higher levels of glucose (94.8 v 85.3 mg/dL, P=0.008) and insulin (15.0 v 10.9 microU/mL, P=0.01), after adjusting for age, ethnicity, sex, and BMI. Compared to nonsmokers, former smokers had similar BMI, but marginally high glucose (P=0.08) and insulin (P=0.11). With respect to measures of pulsatile arterial function, nonsmokers versus current smokers versus former smokers had similar large artery compliance (15.2 v 15.1 v 15.1 mL/mmHgx10) but increased (P=0.01) small artery compliance after smoking cessation (6.6 v 5.8 v 6.5 mL/mmHgx100), and decreased (P=0.03) systemic vascular resistance after smoking cessation (1300.5 v 1376.9 v 1292.2 dynes.sec.cm-5), and increases in small artery compliance (P=0.0003) and decreases in systemic vascular resistance (P=0.01) were found among those who quit smoking 10 years or more, after adjusting for ethnicity, sex, age, glucose, insulin, and alcohol use. These findings, although cross-sectional in nature, indicate the potential for improving arterial wall dynamics after smoking cessation in younger adults. | | Li S, Chen W, Srinivasan S, Boerwinkle E, Berenson GS | Influence of lipoprotein lipase gene Ser447Stop and [beta]1-adrenergic receptor gene Arg389Gly polymorphisms and their interaction on obesity from childhood to adulthood: the Bogalusa Heart Study | International Journal of Obesity. Aug 2006. 30 (8):1183-1188 | Objectives To investigate the influence of lipoprotein lipase (LPL) Ser447Stop and [beta]1-adrenergic receptor (ADRB1) Arg389Gly gene polymorphisms, individually and in combination, on obesity from childhood to adulthood. Design and subjects A community-based cohort of 1331 subjects (30% black and 70% white subjects) was followed over an average period of 23 years from childhood (age range: 4-17 years) to adulthood (age range: 18-44 years). Measurements Body mass index (BMI, kg/m2) and LPL Ser447Stop and the ADRB1 Arg389Gly genotypes. Results The frequency of the ADRB1 Gly389 allele was 0.25 in white subjects vs 0.39 in black subjects (P<0.001); 0.08 vs 0.05 (P=0.280) for the LPL Stop447 allele. There was no association between the LPL Stop447 allele and BMI among white and black subjects either in childhood and adulthood levels or annual change from childhood to adulthood. The ADRB1 Gly389 allele was associated with lower BMI only in black adults (P=0.017). Further, the interaction effect of the LPL Stop447 allele and ADRB1 Gly389 allele on adult BMI or its annual change was significant in white subjects and in the total sample (P=0.03-0.006). Childhood values tended to show a similar trend. Having both ADRB1 Gly389 allele and LPL Stop447 allele was associated with 71% (95% confidence interval: 26-89%) less odds for developing obesity from childhood to adulthood after adjusting for age, race, sex, and childhood BMI. Conclusion: While Gly389 allele of the ADRB1 gene lowers obesity in black subjects, this allele in conjunction with Stop447 allele of the LPL gene lowers obesity in adults and attenuates the development of obesity from childhood to adulthood. These findings underscore the importance of gene-gene interaction in the assessment of genetic influences on complex traits such as obesity. | | Kissinger P, Schmidt N, Mohammed H, Leichliter JS, Gift TL, Meadors B, Sanders C, Farley TA | Patient-delivered partner treatment for Trichomonas vaginalis infection: a randomized controlled trial | Sexually Transmitted Diseases. Jul 2006. 33(7):445-50 | Objectives Infections with Trichomonas vaginalis (TV) are common and recurrence rates are high. Better methods of treating partners of women with trichomoniasis are needed. GOAL: To determine if patient-delivered partner treatment (PDPT) is better and more cost-effective than partner referral. Study Design Women attending a family planning clinic who were culture-positive and treated for TV (N = 463) were randomized to either standard partner referral (PR), booklet-enhanced partner referral (BEPR), or PDPT. At baseline and 1 month, women were interviewed and cultured for TV. Detailed cost information was also collected. Results Most women had 1 partner, were less than 24 years old, and were black. The percentage of women reporting that their partners were treated was similar for PDPT but significantly lower for BEPR compared to PR. TV follow-up rates were similar. PDPT cost less and was cost saving compared to PR and BEPR. Conclusion Among women with TV, PDPT did not result in more partners taking the medicine or lower follow-up rates than PR but was less costly. | | Oberhelman RA, Soto-Castellares G, Caviedes L, Castillo ME, Kissinger P, Moore DA, Evans C, Gilman RH | Improved recovery of Mycobacterium tuberculosis from children using the microscopic observation drug susceptibility method | Pediatrics. Jun 2006. 118(1):e100-6 | Objectives The diagnosis of pulmonary tuberculosis presents challenges in children, because symptoms are nonspecific, sputa are not accessible, and Mycobacterium tuberculosis cultures and smears often are negative. The Microscopic Observation Drug Susceptibility technique is a simple, inexpensive method for Mycobacterium tuberculosis isolation with superior speed and sensitivity over Lowenstein-Jensen culture in studies of adults with pulmonary tuberculosis. The objective of this study was to determine whether Microscopic Observation Drug Susceptibility culture can improve the sensitivity and speed of Mycobacterium tuberculosis recovery among Peruvian children with symptoms suggestive of pulmonary tuberculosis. Methods Two specimens of each type (gastric aspirate, nasopharyngeal aspirate, and stool specimens) were collected from each patient, examined by auramine stain, and cultured by Microscopic Observation Drug Susceptibility and Lowenstein-Jensen techniques. Patients (n=165) were enrolled between April 2002 and February 2004 at the Instituto de Salud del Nino, the major pediatric hospital in Lima, Peru. Inclusion criteria were age < or = 12 years, Stegen-Toledo clinical score > or = 5 points, and absence of antituberculous therapy. The main outcome measurements were (1) proportion of specimens that were culture positive by Microscopic Observation Drug Susceptibility versus Lowenstein-Jensen and (2) days required for positive culture result, stratified by specimen type and auramine stain result. Results Fifteen (9%) patients had at least 1 positive Mycobacterium tuberculosis culture (from stool in 3 cases, nasopharyngeal aspirate in 8 cases, and gastric aspirate in 15 cases). Thirty-eight culture-positive specimens were obtained (22 gastric aspirate, 12 nasopharyngeal aspirates, and 4 stools). Microscopic Observation Drug Susceptibility provided significantly more positive cultures than Lowenstein-Jensen (33 of 38 specimens culture positive by Microscopic Observation Drug Susceptibility vs 21 of 38 by Lowenstein-Jensen). This was attributed to enhanced recovery of Mycobacterium tuberculosis from auramine-negative specimens (19 of 23 by Microscopic Observation Drug Susceptibility vs 9 of 23 by Lowenstein-Jensen), in contrast to similar detection rates for the 2 tests with auramine-positive samples. Similar results were found for analyses that were limited to gastric aspirates. Isolation was faster by Microscopic Observation Drug Susceptibility than Lowenstein-Jensen. Conclusions Isolation of Mycobacterium tuberculosis from children with suspected pulmonary tuberculosis by Microscopic Observation Drug Susceptibility demonstrated greater yield and faster recovery than by Lowenstein-Jensen method, significantly improving local capabilities to detect pediatric tuberculosis in resource-poor settings. | | Srinivasan SR, Frontini MG, Xu J, Berenson GS | Utility of childhood non-high-density lipoprotein cholesterol levels in predicting adult dyslipidemia and other cardiovascular risks: the Bogalusa Heart Study | Pediatrics. Jun 2006. 118(1):201-6 | Objectives This study sought to examine the usefulness of non-high-density lipoprotein cholesterol levels in predicting future dyslipidemia and other cardiovascular risk in adulthood. Methods The study sample consisted of a longitudinal cohort of subjects (n=1163; 30.1% black and 55.4% female) who participated in the Bogalusa Heart Study both as children at 5 to 14 years of age and as adults 27 years later. Results The childhood level of non-high-density lipoprotein cholesterol, like low-density lipoprotein cholesterol, was the best predictor of the adulthood level; the next best predictor for both variables was the change in BMI from childhood to adulthood. Furthermore, those in the age-, race-, and gender-specific top quartile, compared with those in the bottom quartile, of non-high-density lipoprotein cholesterol and low-density lipoprotein cholesterol levels in childhood were 4.5 and 3.5 times more likely, respectively, to develop adult dyslipidemia, independent of baseline BMI and BMI change after 27 years. Although, at equivalent cutoff points, childhood high-risk versus acceptable-risk status for both lipid measures was associated significantly with increased prevalence of obesity and adverse levels of low-density lipoprotein cholesterol and triglycerides in adulthood, only childhood non-high-density lipoprotein cholesterol high-risk status was associated with increased prevalence of low-high-density lipoprotein cholesterol levels, hyperinsulinemia, and hyperglycemia (marginal). Conclusions Adverse levels of non-high-density lipoprotein cholesterol versus low-density lipoprotein cholesterol in childhood not only equally persist over time and better predict adult dyslipidemia but also are related to nonlipid cardiovascular risk factors in adulthood. | | Kabir AA, Whelton PK, Khan MM, Gustat J, Chen W | Association of symptoms of depression and obesity with hypertension: the Bogalusa Heart Study | American Journal of Hypertension. Jun 2006. 19(6):639-45 | Background There is growing evidence that symptoms of depression influence the development of cardiovascular disease. The objective of this study was to evaluate the direct and indirect relationship between symptoms of |
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