Sodium and potassium intakes in a representative population sample: estimation from 24 h urine collections known to be complete in a Cambridgeshire village
1986
Williams, D.R.R. | Bingham, S.A.
Extract: A representative sample of eighty men aged 25-44 years from a Cambridgeshire village, each carried out one 24-h urine collection which was analysed for sodium, potassium, creatinine and urea content. The completeness of the collections was verified using oral doses of p-aminobenzoic acid (PABA; the PABA check test). In the seventy-one collections shown to be complete, the average 24 h excretion of Na was 172 mmol and the average 24 h excretion of K was 74 mmol. Fifty-one of these men's wives also made complete 24 h collections. The average content of these was 128 mmol Na and 61 mmol K. Self reports and creatinine index would have identified as incomplete only 29 and 14 per cent respectively of collections so judged by PABA. Average excretion of 150 mmol Na/d was similar to estimated intakes of 140-167 mmol/d from the National Food Survey (Bull & Buss, 1980).(author)
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