Table 3.
Partial correlations obtained with backward multiple regression analysis.
|
Walking Distance (%) |
||
|---|---|---|
| r | r | |
| Variables not in the equation | ||
| FEV1/FVC (%) | 0.23 | 0.20 |
| Weight (kg) | −0.03 | 0.89 |
| BMI (kg/m2) | −0.03 | 0.90 |
| PImax (%) | 0.29 | 0.16 |
| Variable in the equation | ||
| FFMI (kg/m2) | 0.52 | <0.01 |
FEV1, forced expiratory volume at 1 s; FEV1/FVC, ratio between forced expiratory volume in 1 s and forced vital capacity; MVV, maximal voluntary ventilation; BMI, body mass index; FFMI, fat- free mass index; FMI, fat mass index; PImax, maximal inspiratory pressure; PEmax, maximal expiratory pressure. FFMI was the unique significant independent predictor of walking distance.