Estimating Usual Sodium Intake and Sodium-to-Potassium Molar Ratios From Urine Excretion Among Canadian Adults: An Analysis of the Canadian Health Measures Survey

摘要

High dietary sodium is now well established to be a major risk factor for hypertension, cardiovascular disease and mortality. Monitoring population sodium intakes is critical for evaluating progress towards Health Canada's dietary salt reduction targets. Given that approximately 90% of ingested sodium is excreted in the urine, accurate estimations of average daily urinary sodium is critical for determining population sodium intake. However, until recently, nationally representative surveys from Canada have only collected a single “spot” (casual) urine sample which are prone to bias due to large day-to-day variation amongst individuals. The aim of this study was to estimate average population sodium intake using the latest version of the Canadian Heath Measures Survey, Cycle 5 (2016–2017) which, for the first time includes 2 non-consecutive days of spot urine samples from a representative sample of the Canadian population.