Table 3. Agreement between bioelectrical impedance analysis and dual-energy X-ray absorptiometry.
| Method | Bland-Altman Plot | CCC (ρc) | ICC (r1) | |||
|---|---|---|---|---|---|---|
| Bias | Limit of agreement | Function | p | |||
| Boys (n = 72) | ||||||
| LBM8SF | 2.12 | -0.65 to 4.90 | y = 0.082 x + 4.208 | 0.005 | 0.900 | 0.887 |
| LBM8MF | -0.15 | -1.82 to 1.52 | y = -0.002 x − 0.096 | 0.902 | 0.989 | 0.943 |
| FM8SF | -3.05 | -5.63 to -0.47 | y = 0.012 x − 3.156 | 0.571 | 0.911 | 0.973 |
| FM8MF | -1.35 | -3.21 to 0.55 | y = -0.055 x − 0.763 | < 0.0001 | 0.975 | 0.977 |
| %BF8SF | -8.82% | -17.46 to -0.19% | y = 0.205 x − 13.526 | < 0.0001 | 0.717 | 0.992 |
| %BF8MF | -3.00% | -7.54 to 1.55% | y = 0.013 x − 3.335 | 0.620 | 0.936 | 0.986 |
| ALM8SF | 1.87 | -0.97 to 4.71 | y = 0.216 x − 0.585 | < 0.0001 | 0.770 | 0.989 |
| ALM8MF | 2.93 | 0.69 to 5.17 | y = 0.248 x + 0.016 | < 0.0001 | 0.671 | 0.972 |
| Girls (n = 78) | ||||||
| LBM8SF | 2.44 | 0.37 to 4.52 | y = -0.015 x + 2.790 | 0.500 | 0.890 | 0.990 |
| LBM8MF | 0.37 | -0.88 to 1.63 | y = 0.018 x − 0.076 | 0.126 | 0.991 | 0.994 |
| FM8SF | -3.29 | -5.68 to -0.90 | y = -0.150 x − 2.008 | < 0.0001 | 0.763 | 0.992 |
| FM8MF | -1.70 | -3.30 to -0.10 | y = -0.107 x − 0.691 | < 0.0001 | 0.923 | 0.970 |
| %BF8SF | -9.72% | -15.99 to -3.45% | y = -0.065 x − 8.149 | 0.229 | 0.445 | 0.989 |
| %BF8MF | -4.48% | -8.50 to -0.46% | y = -0.001 x − 4.512 | 0.969 | 0.798 | 0.979 |
| ALM8SF | 1.42 | -0.14 to 2.97 | y = -0.045 x + 1.877 | 0.192 | 0.828 | 0.981 |
| ALM8MF | 3.01 | 0.74 to 5.28 | y = 0.295 x − 0.208 | < 0.0001 | 0.635 | 0.953 |
Abbreviation: CCC, Lin’s concordance correlation coefficient; ρc, CCC coefficient; ICC, intra-class correlation; r1, ICC coefficient