Key result
A spot urine sample collected in the late afternoon strongly correlated with 24-hour sodium excretion (r=0.86, P<.001) and identified excretion <100 mEq/d with 100% sensitivity and 82% specificity.
Why the study?
Does a spot urine sample accurately predict 24-hour sodium excretion compared to a 24-hour urine collection?
Observational
Does a spot urine sample accurately predict 24-hour sodium excretion compared to a 24-hour urine collection?
Effect estimate: r=0.86
p-value: p=<.001
A late afternoon spot urine sample adjusted for 24-hour creatinine excretion strongly correlates with 24-hour sodium excretion, offering a potentially convenient alternative for monitoring sodium intake.
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May support convenient sodium monitoring; leaves open prospective validation before replacing 24-hour collections.
Mann et al. (2010) reported an observational. Spot urine sample vs. 24-hour urine collection was evaluated on Correlation between predicted and actual 24-hour sodium excretion (r=0.86, p=<.001). A spot urine sample collected in the late afternoon strongly correlated with 24-hour sodium excretion (r=0.86, P<.001) and identified excretion <100 mEq/d with 100% sensitivity and 82% specificity.
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