Estimation of 24-h urinary sodium excretion using lean body mass and overnight urine collected by a pipe-sampling method.

Unlabelled: BACKGROUND Although salt intake can be estimated from 24-h urinary sodium excretion (Na24 ), for a long time there has been no precise and easy method for its measurement.

Objective: To investigate the possibility of estimating Na24 using pipe-sampling of overnight urine and lean body mass.

Participants And Methods: Body height, body weight and body fat determined by bioelectrical impedance (lean body mass = body weight body fat) was measured in 351 healthy individuals (126 men, 225 women).