Relationship of urinary sodium and sodium-to-potassium ratio to blood pressure in older adults in Australia

Abstract

Objective: To assess the relationship between dietary sodium intake, as measured by urinary electrolyte excretion, and blood pressure within a population of older Australian adults. Design, setting and participants: A cross-sectional study of adults enrolled in the Melbourne Collaborative Cohort Study, stratified by sex, country of birth (Italy, Greece, Australia/New Zealand) and age (50-59 and 60-75 years). Blood pressure measurements were taken in 2003-2007 and 24-hour urine collections in 2007-2008. Main outcome measures: 24-hour urinary excretion of sodium and potassium, urinary sodium-to-potassium ratio, and clinic blood pressure measurement. Results: The mean ±SD age of 783 participant..