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Increasing evidence links dietary patterns to the development of vascular disease. The Women's Health Initiative (WHI) is a study of more than 90,000 postmenopausal women. In this observational portion of the study, the researchers analyzed potassium intake and risk for stroke; they also aimed to evaluate stroke subtypes. They assessed participants' potassium intake by food frequency questionnaires administered at two times 3 years apart.
Potassium intake was divided in quartiles; mean dietary intake was 2611 mg/day. Blacks, current smokers, and nondrinkers of alcohol had relatively reduced potassium intake. The authors adjusted their analyses for these factors and for age, hypertension status, physical activity, body-mass index, hormone use…