Table 2.
Univariate analysis for HOMAIR as a dependent variable (n = 82).
| Independent variable | β (se) | P value+ | rs† | RMSE** |
|---|---|---|---|---|
| PACER (laps) | −0.07 (0.01) | <.0001* | −0.60 | 1.68 |
| PACER-estimated VO2 max | −0.21 (0.04) | <.0001* | −0.51 | 1.72 |
| VO2 max | −0.13 (0.02) | <.0001* | −0.70 | 1.56 |
| VO2 max/kgLBM | −0.10 (0.02) | .0001* | −0.47 | 1.79 |
| BMI | 0.19 (0.02) | <.0001* | 0.65 | 1.54 |
| BMI z score | 1.03 (0.25) | <.0001* | 0.66 | 1.59 |
| Percent body fat | 0.14 (0.02) | <.0001* | 0.71 | 1.47 |
+P-value for testing H0: β = 0 versus HA: β ≠ 0.
†Spearman's rank correlation coefficient.
**Cross-validation Root Mean Square Error (RMSE) on original scale for m = 1000 re-samples with sample size n1 = 50 (model fitting) and n2 = 32 (model validation).
*P < .05.