Table 1.
Subject descriptive characteristics and the validation of BIS for predicting total body water compared to deuterium oxide (n = 28, 14 men, 14 women)
| Agreement (L) | ||||||||||||||
| Weight (kg) ± SD | Height (cm) ± SD | Method | ± SD (L) | Slope | Intercept | r | r2 | SEE (L) | TE (L) | CE/Bias | Upper Limits | Lower Limits | Trend | |
| All Subjects | 72.8 ± 17.58 | 174.6 ± 8.7 | 4000B | 38.28 ± 10.71 | 0.897 | 6.19* | 0.96 | 0.92 | 2.99 | 3.81 | 2.26* | 8.39 | -3.88 | -0.70 |
| SFB7 | 40.63 ± 10.69 | 0.920 | 3.18 | 0.98 | 0.96 | 2.12 | 2.21 | -0.09 | 4.31 | -4.50 | -1.32 | |||
| D2O | 40.54 ± 10.05 | |||||||||||||
| Men | 87.10 ± 12.52 | 181.2 ± 6.4 | 4000B | 47.51 ± 6.43 | 0.767 | 12.59 | 0.81 | 0.66 | 3.75 | 4.05 | 1.50 | 9.15 | -6.15 | -0.13 |
| SFB7 | 49.81 ± 6.29 | 0.879 | 5.22 | 0.91 | 0.83 | 2.70 | 2.73 | -0.80 | 4.49 | -6.11 | -0.15 | |||
| D2O | 49.01 ± 6.11 | |||||||||||||
| Women | 58.49 ± 6.67 | 168.1 ± 4.9 | 4000B | 29.05 ± 3.68 | 1.014 | 2.62 | 0.88 | 0.77 | 2.05 | 3.56 | 3.01* | 6.87 | -0.85 | 0.55 |
| SFB7 | 31.44 ± 4.00 | 0.991 | 0.92 | 0.94 | 0.88 | 1.50 | 1.52 | 0.62 | 3.45 | -2.20 | 0.43 | |||
| D2O | 32.06 ± 3.68 | |||||||||||||
* Represents significance at (p ≤ 0.025), SFB7 = Imp™ SFB7, 4000B = XiTRON 4000B, CE/Bias = constant (mean) error,TE = total error, SEE = standard error of estimate, r = Pearson product-moment correlation coefficient, Limits = 95% limits of agreement (CE ± 1.96 SD of residual scores (predicted – actual)), Trend = relationship between the difference of D2O and BIS method (SFB7, 4000B) and the mean of both methods.