Monitoring the South African population’s salt intake: spot urine v. 24 h urine

The present study set out to determine whether morning spot urine samples can be used to monitor Na (and K) intake levels in South Africa, instead of the 'gold standard' 24 h urine sample.Participants collected one 24 h and one spot urine sample for Na and K analysis, after which estimations using three different formulas (Kawasaki, Tanaka and INTERSALT) were calculated.Between 2013 and 2015, urine samples were collected from different...