Table 4 Fat-free mass determined by dual-energy x-ray absorptiometry and derived equations based on different resistance indices (RI)
Method | Group A (n = 33) | Group B (n = 33) | P |
|---|---|---|---|
DXA Mean ± SD (kg) | 47.9 ± 12.6 | 46.9 ± 10.9 | 0.682 |
H2/R50 | |||
Mean ± SD (kg) | 48.3 ± 11.4 | 46.5 ± 10.8 | 0.519 |
Bias (kg) | 0.4 | -0.5 | |
Limits of agreement (kg) | -6.8 to 7.6 | -7.9 to 7.0 | |
r c (95% CI) | 0.95 (0.91 – 0.97) | 0.94 (0.88 – 0.97) | |
H2/R∞ | |||
Mean ± SD (kg) | 48.3 ± 11.4 | 46.5 ± 10.6 | 0.516 |
Bias (kg) | 0.4 | -0.4 | |
Limits of agreement (kg) | -7.5 to 8.2 | -7.5 to 6.6 | |
r c (95% CI) | 0.94 (0.89 – 0.97) | 0.94 (0.89 – 0.97) | |
H2/Zc | |||
Mean ± SD (kg) | 48.1 ± 11.3 | 46.7 ± 11.2 | 0.612 |
Bias (kg) | 0.2 | -0.2 | |
Limits of agreement (kg) | -6.9 to 7.2 | -8.6 to 8.1 | |
r c (95% CI) | 0.95 (0.91 – 0.98) | 0.93 (0.85 – 0.96) | |