Stepwise forward multivariable linear regression analysis for significant predictors of the aerobic mean score difference
| Model* | R2 | R2 change | B | β | P value |
| Model 1 | 0.018 | 0.018 | –0.038 | –0.133 | <0.001 |
| Model 2 | 0.070 | 0.053 | –31.18 | –0.321 | <0.001 |
| Model 3 | 0.136 | 0.066 | –46.28 | –0.468 | <0.001 |
| Model 4 | 0.150 | 0.014 | 20.93 | 0.120 | <0.001 |
*Model 1: 3000 m race time at baseline; model 2: model 1+combatant status; model 3: model 2+sex; model 4: model 3+infection status.