摘要: in two European populations, we studied forty Italian (twenty male and twenty female) and forty-three Dutch (twenty-three male and twenty female) healthy subjects aged 1941 years. The main differences in body build between the two groups were height, trunk length and the two ratios TBW/height and ECW/height. Population+ pecific prediction formulas for ECW (at 1 kHz) and TBW (at 100 kHz) were developed. The prediction errors for ECW and TBW were about 0.6 and 1.5 kg respectively,(CV 4%) in both groups. Cross-validation analysis showed no significant error in the prediction of TBW but a slight error (range-4.9 to+ 2.8%) in the ECW prediction. The biases in both TBW and ECW were correlated with ECW/TBW (Y-0.44, P< 0.0005 and Y+ 0.52, P< 0.0005 respectively) in the two groups; the biases in ECW were also related to ECW/height (r 0-51, P< 0.001),
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