Number of Pregnancies and Risk for Stroke and Stroke Subtypes
- 1 February 1997
- journal article
- research article
- Published by American Medical Association (AMA) in Archives of Neurology
- Vol. 54 (2), 203-206
- https://doi.org/10.1001/archneur.1997.00550140073015
Abstract
Objective: To examine the effect of the number of pregnancies on the subsequent risk for stroke and stroke subtypes. Design: Prospective cohort study. Participants: National cohort of 3852 women aged 45 to 74 years who participated in the first National Health and Nutrition Examination Survey Epidemiology Follow-up Study. Main Outcome Measures: Stroke, cerebral infarction, and intracerebral hemorrhage during a 20-year follow-up period. Results: After adjusting for differences in age, women with 6 or more pregnancies were at an increased risk for any type of stroke (relative risk [RR]=1.7; 95% confidence interval [CI], 1.2-2.3) and cerebral infarction (RR=1.6; 95% CI, 1.2-2.3). Adjustment for stroke risk factors explained some but not all of the risk associated with pregnancy (RR=1.3; 95% CI, 0.9-1.9 for all stroke, and RR=1.3; 95% CI, 0.9-1.9 for cerebral infarction). The rate of intracerebral hemorrhage was 3-fold higher among women who had been pregnant when compared with nulligravida women; however, this finding did not reach statistical significance possibly because of the small number of intracerebral hemorrhages (n=33). Conclusion: The number of pregnancies may influence the risk for stroke, particularly cerebral infarction, in women.Keywords
This publication has 5 references indexed in Scilit:
- Risk Factors for Spontaneous Intracerebral HemorrhageStroke, 1995
- Black-white differences in stroke incidence in a national sample. The contribution of hypertension and diabetes mellitusJAMA, 1990
- The Effect of Parity on the Later Development of Non-Insulin-Dependent Diabetes Mellitus or Impaired Glucose ToleranceThe New England Journal of Medicine, 1989
- SERUM LIPIDS IN YOUNG WOMEN BEFORE, DURING, AND AFTER PREGNANCY1American Journal of Epidemiology, 1987
- Long term effects of childbearing on health.Journal of Epidemiology and Community Health, 1985