The proposed research is designed to assess the impact of dietary behaviors and activity-related variables on the risk of pregnancy-induced hypertension in a cohort of pregnant women. Only a handful of studies to date have evaluated such associations. Identification of risk factors for pregnancy-induced hypertension (PIH) has assumed even greater importance in the 1990s in light of recent evidence that calcium supplementation and aspirin use during pregnancy may reduce the risk of these conditions. In regard to the outcomes of preeclampsia and gestational hypertension, this research will examine the following: 1) whether caffeine intake is a positive risk factor; 2) whether alcoholic beverage consumption during pregnancy influences risk; 3) whether employment status and occupational factors such as organic solvent exposure increase risk; and 4) whether leisure time physical activity during pregnancy confers protection. Dose-response relationships and risks associated with early and late pregnancy exposures will also be examined. Data for this research come form the Yale Health in Pregnancy Study (1988-1992), a longitudinal epidemiological study of pregnancy outcomes among 2967 pregnant women who received private prenatal care from one of 13 practices in the New Haven area. All women were personally interviewed before 16 weeks gestation, on one to three other occasions during pregnancy, and within days of delivery regarding the factors targeted for analysis. The cohort to be analyzed for the proposed research will be restricted to women who had a live or still- birth after 20 weeks gestation (n=2657). Because the original study was not designed to evaluate PIH as a primary outcome of interest, the principal investigator will review the prenatal and delivery charts of all women who had any mention of hypertension on their charts (N=382) in order to diagnose preeclampsia and gestational hypertension using standardized case definitions. Preeclampsia is defined as hypertension in pregnancy diagnosed after 20 weeks gestation in the presence of proteinuria, and/or edema, and/or a five pound weight gain in one week. Gestational hypertension is hypertension in pregnancy diagnosed after 20 weeks gestation in the absence of proteinuria, edema, and a five pound weight gain in one week. This research will employ standard epidemiologic analytic techniques, including logistic regression analysis, to evaluate exposure/disease associations while controlling simultaneously for the potential effects of interaction and confounding.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
First Independent Research Support & Transition (FIRST) Awards (R29)
Project #
1R29HD032579-01A1
Application #
2205737
Study Section
Special Emphasis Panel (ZRG4-EDC-1 (03))
Project Start
1995-09-01
Project End
2000-08-31
Budget Start
1995-09-01
Budget End
1996-08-31
Support Year
1
Fiscal Year
1995
Total Cost
Indirect Cost
Name
Yale University
Department
Public Health & Prev Medicine
Type
Schools of Medicine
DUNS #
082359691
City
New Haven
State
CT
Country
United States
Zip Code
06520
Zhao, Linlu; Triche, Elizabeth W; Walsh, Kyle M et al. (2012) Genome-wide association study identifies a maternal copy-number deletion in PSG11 enriched among preeclampsia patients. BMC Pregnancy Childbirth 12:61
Saftlas, Audrey F; Triche, Elizabeth W; Beydoun, Hind et al. (2010) Does chocolate intake during pregnancy reduce the risks of preeclampsia and gestational hypertension? Ann Epidemiol 20:584-91
Eras, J L; Saftlas, A F; Triche, E et al. (2000) Abortion and its effect on risk of preeclampsia and transient hypertension. Epidemiology 11:36-43