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  • Women consuming more than 1926 mg potassium per day 12-15% less likely to have a stroke over 11 yrs


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    Sunday, September 28, 2014 12:15 pm Email this article

    The three-fourths of women consuming more than 1926 mg of potassium per day were 12-15% less likely to have a stroke during an average follow-up of 11 years than the one-fourth of women consuming less than 1926 mg per day according to a new study.

    To say this the other way, the one-fourth of women consuming the least potassium, less than 1926 mg of potassium per day, were 14-18% MORE likely to have a stroke than the one-fourth of women consuming more potassium than this, more than 1926 mg of potassium per day, over an average follow-up of 11 years.

    “High potassium intake is associated with a lower risk of all stroke and ischemic stroke, as well as all-cause mortality in older women, particularly those who are not hypertensive,” the authors of the paper concluded.

    Risk of Stroke by Quartile

    Risk by Stroke by Quartile: 12-15% lower risk of stroke over 11 years

    Compared to the one-fourth of women consuming the least potassium—less than 1926 mg per day—the total risk of stroke during an average follow-up of 11 years was as follows:

    This was after adjusting for age, race, hypertension status, smoking, physical activity, history of diabetes mellitus, history of atrial fibrillation, history of myocardial infarction, hormone use, alcohol intake, aspirin use, high cholesterol, and body mass index.

    Ischemic Stroke

    Ischemic Stroke: 15-16% lower risk of ischemic stroke over 11 years

    Compared to the one-fourth of women consuming the least potassium—less than 1926 mg per day—the total risk of ischemic stroke during an average follow-up of 11 years was as follows:

    Hemorrhagic Stroke

    Hemorrhagic Stroke: 9-22% lower risk of hemorrhagic stroke over 11 years, but not statistically significant

    Compared to the one-fourth of women consuming the least potassium—less than 1926 mg per day—the total risk of hemorrhagic stroke during an average follow-up of 11 years was as follows:

    Subjects

    Subjects: 90,137 women 50- to 79-years-old

    “The study population consisted of 90,137 postmenopausal women aged 50- to 79- [years-old] at enrollment, free of stroke history at baseline, followed up prospectively for an average of 11 years,” the paper notes.

    This data is from The Women’s Health Initiative Observational Study (WHI-OS), the largest prospective cohort study of postmenopausal women with long-term follow-up.

    Reference

    Seth A, Mossavar-Rahmani Y, Kamensky V, Silver B, Lakshminarayan K, Prentice R, Van Horn L, and Wassertheil-Smoller S. Potassium Intake and Risk of Stroke in Women With Hypertension and Nonhypertension in the Women’s Health Initiative. Stroke, 2014 Oct; 45(10): 2874-2880.

    The paper is posted here:
    http://stroke.ahajournals.org/content/45/10/2874.long

    Author’s Contact Info

    Sylvia Wassertheil-Smoller, PhD
    Department of Epidemiology and Population Health
    Albert Einstein College of Medicine
    1300 Morris Park Ave
    Belfer Building, Rm 1312
    Bronx, NY 10461 USA
    .(JavaScript must be enabled to view this email address)

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