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A prospective study of body mass index, weight change, and risk of stroke in women.
JAMA 1997; 277(19):1539-45JAMA

Abstract

OBJECTIVE

To examine the associations of body mass index (BMI) and weight change with risk of stroke in women.

SETTING AND DESIGN

Prospective cohort study among US female registered nurses participating in the Nurses' Health Study.

PARTICIPANTS

A total of 116759 women aged 30 to 55 years in 1976 who were free from diagnosed coronary heart disease, stroke, and cancer.

MAIN OUTCOME MEASURE

Incidence of ischemic stroke, hemorrhagic stroke (subarachnoid or intraparenchymal hemorrhage), and total stroke.

RESULTS

During 16 years of follow-up, 866 total strokes (including 403 ischemic strokes and 269 hemorrhagic strokes) were documented. In multivariate analyses adjusted for age, smoking, postmenopausal hormone use, and menopausal status, women with increased BMI (> or =27 kg/m2) had significantly increased risk of ischemic stroke, with relative risks (RRs) of 1.75 (95% confidence interval [CI], 1.17-2.59) for BMI of 27 to 28.9 kg/m2; 1.90 (95% CI, 1.28-2.82) for BMI of 29 to 31.9 kg/m2; and 2.37 (95% CI, 1.60-3.50) for BMI of 32 kg/m2 or more (P for trend<.001), as compared with those with a BMI of less than 21 kg/m2. For hemorrhagic stroke there was a nonsignificant inverse relation between obesity and hemorrhagic stroke, with the highest risk among women in the leanest BMI category (P for trend=.20). For total stroke the RRs were somewhat attenuated compared with those for ischemic stroke but remained elevated for women with higher BMI (P for trend<.001). In multivariate analyses that also adjusted for BMI at age 18 years, weight gain from age 18 years until 1976 was associated with an RR for ischemic stroke of 1.69 (95% CI, 1.26-2.29) for a gain of 11 to 19.9 kg and 2.52 (95% CI, 1.80-3.52) for a gain of 20 kg or more (P for trend<.001), as compared with women who maintained stable weight (loss or gain <5 kg). Although weight change was not related to risk of hemorrhagic stroke (P for trend=.20), a direct relationship was observed between weight gain and total stroke risk (P for trend<.001).

CONCLUSIONS

These prospective data indicate that both obesity and weight gain in women are important risk factors for ischemic and total stroke but not hemorrhagic stroke. The relationship between obesity and total stroke depends on the distribution of stroke subtypes in the population.

Authors+Show Affiliations

Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA. kmrexrode@bics.bwh.harvard.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

9153368

Citation

Rexrode, K M., et al. "A Prospective Study of Body Mass Index, Weight Change, and Risk of Stroke in Women." JAMA, vol. 277, no. 19, 1997, pp. 1539-45.
Rexrode KM, Hennekens CH, Willett WC, et al. A prospective study of body mass index, weight change, and risk of stroke in women. JAMA. 1997;277(19):1539-45.
Rexrode, K. M., Hennekens, C. H., Willett, W. C., Colditz, G. A., Stampfer, M. J., Rich-Edwards, J. W., ... Manson, J. E. (1997). A prospective study of body mass index, weight change, and risk of stroke in women. JAMA, 277(19), pp. 1539-45.
Rexrode KM, et al. A Prospective Study of Body Mass Index, Weight Change, and Risk of Stroke in Women. JAMA. 1997 May 21;277(19):1539-45. PubMed PMID: 9153368.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A prospective study of body mass index, weight change, and risk of stroke in women. AU - Rexrode,K M, AU - Hennekens,C H, AU - Willett,W C, AU - Colditz,G A, AU - Stampfer,M J, AU - Rich-Edwards,J W, AU - Speizer,F E, AU - Manson,J E, PY - 1997/5/21/pubmed PY - 1997/5/21/medline PY - 1997/5/21/entrez SP - 1539 EP - 45 JF - JAMA JO - JAMA VL - 277 IS - 19 N2 - OBJECTIVE: To examine the associations of body mass index (BMI) and weight change with risk of stroke in women. SETTING AND DESIGN: Prospective cohort study among US female registered nurses participating in the Nurses' Health Study. PARTICIPANTS: A total of 116759 women aged 30 to 55 years in 1976 who were free from diagnosed coronary heart disease, stroke, and cancer. MAIN OUTCOME MEASURE: Incidence of ischemic stroke, hemorrhagic stroke (subarachnoid or intraparenchymal hemorrhage), and total stroke. RESULTS: During 16 years of follow-up, 866 total strokes (including 403 ischemic strokes and 269 hemorrhagic strokes) were documented. In multivariate analyses adjusted for age, smoking, postmenopausal hormone use, and menopausal status, women with increased BMI (> or =27 kg/m2) had significantly increased risk of ischemic stroke, with relative risks (RRs) of 1.75 (95% confidence interval [CI], 1.17-2.59) for BMI of 27 to 28.9 kg/m2; 1.90 (95% CI, 1.28-2.82) for BMI of 29 to 31.9 kg/m2; and 2.37 (95% CI, 1.60-3.50) for BMI of 32 kg/m2 or more (P for trend<.001), as compared with those with a BMI of less than 21 kg/m2. For hemorrhagic stroke there was a nonsignificant inverse relation between obesity and hemorrhagic stroke, with the highest risk among women in the leanest BMI category (P for trend=.20). For total stroke the RRs were somewhat attenuated compared with those for ischemic stroke but remained elevated for women with higher BMI (P for trend<.001). In multivariate analyses that also adjusted for BMI at age 18 years, weight gain from age 18 years until 1976 was associated with an RR for ischemic stroke of 1.69 (95% CI, 1.26-2.29) for a gain of 11 to 19.9 kg and 2.52 (95% CI, 1.80-3.52) for a gain of 20 kg or more (P for trend<.001), as compared with women who maintained stable weight (loss or gain <5 kg). Although weight change was not related to risk of hemorrhagic stroke (P for trend=.20), a direct relationship was observed between weight gain and total stroke risk (P for trend<.001). CONCLUSIONS: These prospective data indicate that both obesity and weight gain in women are important risk factors for ischemic and total stroke but not hemorrhagic stroke. The relationship between obesity and total stroke depends on the distribution of stroke subtypes in the population. SN - 0098-7484 UR - https://www.unboundmedicine.com/medline/citation/9153368/A_prospective_study_of_body_mass_index_weight_change_and_risk_of_stroke_in_women_ L2 - https://jamanetwork.com/journals/jama/fullarticle/vol/277/pg/1539 DB - PRIME DP - Unbound Medicine ER -