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Related Experiment Videos

Dietary potassium intake and stroke mortality.

J Fang1, S Madhavan, M H Alderman

  • 1Department of Epidemiology and Social Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA. fang@aecom.yu.edu

Stroke
|July 8, 2000
PubMed
Summary

Higher dietary potassium intake was linked to lower stroke mortality in men, particularly black men and hypertensive men. This association was not observed in women. Further research is needed to confirm these findings.

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Area of Science:

  • Cardiovascular epidemiology
  • Nutritional science
  • Public health

Background:

  • Previous studies suggested an inverse relationship between dietary potassium and stroke mortality in smaller populations.
  • The National Health and Nutrition Examination Survey (NHANES I) Epidemiological Follow-up Study provides a larger dataset to investigate this association.

Purpose of the Study:

  • To examine the association between dietary potassium intake and stroke mortality in a large, diverse sample.
  • To determine if this association differs by sex, race, or hypertensive status.

Main Methods:

  • Analysis of baseline data (1971-1975) and follow-up data through 1992 from 9866 subjects in the NHANES I study.
  • Dietary potassium intake assessed via 24-hour dietary recall.
  • Stroke mortality recorded through the follow-up period, with an average follow-up of 16.7 years.

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Main Results:

  • Lower dietary potassium intake was significantly associated with higher stroke mortality in men, both white and black, when stratified by tertiles of intake.
  • This association was primarily observed in hypertensive men and black men.
  • No significant association between dietary potassium intake and stroke mortality was found for women, regardless of race or hypertensive status.

Conclusions:

  • The previously reported inverse association between dietary potassium and stroke mortality was confirmed, but only in specific subgroups: black men and hypertensive men.
  • These findings highlight the importance of considering sex, race, and hypertensive status when evaluating the role of dietary potassium in stroke prevention.