Chronic hypertension, pregnancy-induced hypertension, and low birthweight.
We examined the associations between chronic hypertension, pregnancy-induced hypertension, and low birthweight in a retrospective cohort study using Washington birth certificate data. The adjusted prevalence ratio for low birthweight associated with chronic hypertension was 3.9 [95% confidence interval (CI) = 3.4-4.4]. The prevalence ratio for pregnancy-induced hypertension associated with chronic hypertension ranged from 3.6 (95% CI = 3.2-4.1) for primiparous women to 10.7 (95% CI = 8.7-13.2) for multiparous women. The association of chronic hypertension and low birthweight could not be explained by the increased risk of pregnancy-induced hypertension in these women.
Department of Epidemiology, University of Washington, Seattle.
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Velentgas
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Benga-De
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Williams
D002908:Chronic Disease; D015331:Cohort Studies; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications* / Q000208:ethnology; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D011225:Pre-Eclampsia / Q000150:complications; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000208:ethnology; D015995:Prevalence; D012189:Retrospective Studies; D014861:Washington / Q000453:epidemiology