Table 3.
Multicomponent anthropometric model matrix, precision, and internal cross-validity for simultaneously measuring of body composition in boys.
| β FM | β BMC | β LST | |
|---|---|---|---|
| Height (cm) | −0.0857 | 0.0032 | 0.0820 |
| Weight (kg) | 0.3139 | 0.0392 | 0.6419 |
| SkSi (mm) | 0.1970 | −0.0095 | −0.1964 |
| SkHab (mm) | 0.2350 | −0.0105 | −0.2321 |
| PHV (yr) | −0.6571 | 0.0525 | 0.7047 |
| Precision | |||
| R 2 | 0.9808 | 0.9930 | 0.9981 |
| Adj R 2 | 0.9805 | 0.9929 | 0.9981 |
| SEEresidual (kg) | 1.6660 | 0.1923 | 1.7480 |
| Cross-validation | |||
| PRESS | 1162.433 | 15.37255 | 1280.083 |
| R PRESS 2 | 0.9490 | 0.9402 | 0.9804 |
| SEEPRESS (kg) | 0.0850 | 0.0098 | 0.0892 |
β: estimated parameter vector; FM: fat mass, BMC: bone mineral content; LST: lean soft tissue; Sk: skinfold; SkSi: suprailiac; SkHab: horizontal abdominal; PHV: age for peak height velocity; R 2: coefficient of determination (observed and cross-predicted); Adj R 2: adjusted coefficient of determination; SEEresidual: residual standard error of estimate; PRESS: sum of squares of residuals; R 2 PRESS: press coefficient of determination; SEEPRESS: press standard error of estimate.