Table 2.

Accuracy and precision of anthropometric TBW prediction by Equations 2a and 2b in subsets of validation cohorta

Measured TBW (L)Calculated TBW (L)Difference Estimated from Measured TBW (L)RMSE (L)CV (%)
Total population16.9 ± 9.516.9 ± 9.20.001 ± 2.152.1712.8
PPDSC subset15.1 ± 10.415.5 ± 10.40.40 ± 2.362.3815.7
Heidelberg subset19.0 ± 8.118.6 ± 7.5−0.45 ± 1.811.829.6
Random 2/3 subset15.8 ± 9.315.7 ± 9.2−0.04 ± 2.462.4615.6
Random 1/3 subset18.8 ± 9.718.9 ± 9.20.07 ± 1.611.628.6
Boys18.2 ± 10.018.2 ± 9.9−0.02 ± 1.891.9210.5
Girls14.9 ± 8.414.9 ± 8.00.04 ± 2.542.5917.4
BMI SDS >114.9 ± 11.114.7 ± 11.2−0.17 ± 2.692.7518.5
BMI SDS <117.6 ± 8.917.7 ± 8.40.06 ± 1.941.9611.1
Height SDS <−215.5 ± 8.215.2 ± 7.7−0.31 ± 2.132.1613.9
Height SDS >−218.6 ± 10.718.9 ± 10.50.35 ± 2.152.1911.8
  • a RMSE, root mean square error; CV, coefficient of variation.