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Intersalt in Newfoundland and Labrador.

E Funke1, B Schieffer, M Baikie

  • 1Division of Community Medicine, Memorial University of Newfoundland, St. John's, Canada.

Annals of Nutrition & Metabolism
|January 1, 1990
PubMed
Summary
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This study investigated blood pressure factors in Canadian adults, finding body mass index (BMI) and alcohol intake most significant in men. Unlike global findings, the sodium-potassium link to blood pressure was not confirmed in this Canadian cohort.

Area of Science:

  • Cardiovascular Health
  • Human Physiology
  • Nutritional Epidemiology

Background:

  • The Intersalt study indicated positive associations between urinary sodium and potassium excretion and blood pressure globally.
  • Factors like Body Mass Index (BMI), alcohol, and smoking show varied effects on blood pressure across populations.
  • Previous research suggests a link between dietary salt and potassium and hypertension risk.

Purpose of the Study:

  • To investigate the relationship between urinary sodium and potassium excretion and blood pressure within Canadian population subgroups.
  • To examine the influence of Body Mass Index (BMI), alcohol consumption, and smoking on blood pressure in Canadian men and women.
  • To determine if the global Intersalt findings on sodium-potassium and blood pressure are replicable in a Canadian context.

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Main Methods:

  • Utilized data from two Canadian centers participating in the Intersalt study.
  • Employed multiple stepwise regression analysis to identify significant predictors of blood pressure.
  • Analyzed associations between blood pressure, 24-hour urinary sodium and potassium excretion, BMI, alcohol intake, and smoking status.

Main Results:

  • The expected positive relationship between sodium-potassium excretion and blood pressure was not confirmed in the Canadian participants.
  • In men, Body Mass Index (BMI) and alcohol intake demonstrated the strongest associations with blood pressure.
  • In women, BMI and sodium excretion were key factors for systolic blood pressure, while BMI and smoking were significant for diastolic blood pressure.

Conclusions:

  • The influence of high sodium and low potassium excretion on blood pressure could not be discerned in this Canadian cohort.
  • Body Mass Index (BMI) emerged as a significant factor influencing blood pressure in both genders within the Canadian study population.
  • Dietary and lifestyle factors like alcohol and smoking show differential impacts on blood pressure depending on sex and population.