Predictors | Total | Female | Male | P-value |
---|---|---|---|---|
Sex, n (%) | 389 (100) | 153 (39.3) | 236 (60.7) | |
Age (years) | 63.6 ± 6.8 | 62.6 ± 6.3 | 64.2 ± 7.0 | 0.028 |
6MWD (m) | 423 ± 112 | 406 ± 104 | 434 ± 115 | 0.015 |
SpO2 before 6MWT (%) | 94.2 ± 2.7 | 94.1 ± 2.9 | 94.3 ± 2.6 | 0.621 |
SpO2 after 6MWT (%) | 91.0 ± 5.7 | 90.9 ± 6.1 | 91.0 ± 5.4 | 0.804 |
Borg dyspnea score after 6MWT (median) | 4.0 | 4.0 | 3.0 | 0.085 |
mMRC | 2.2 ± 2.3 | 2.3 ± 2.4 | 2.1 ± 2.2 | 0.410 |
BMI (kg/m2) | 25.4 ± 5.2 | 24.5 ± 5.7 | 25.9 ± 4.8 | 0.016 |
FMI (kg/m2) | 8.4 ± 3.3 | 9.8 ± 3.7 | 7.4 ± 2.6 | < 0.001 |
FFMI (kg/m2) | 17.0 ± 3.2 | 14.7 ± 2.4 | 18.5 ± 2.8 | < 0.001 |
Smoking status n (%) | 0.215 | |||
Current | 167 (43) | 72 (47) | 95 (40) | |
Former | 222 (57) | 81 (53) | 141 (60) | |
Pack years | 40.9 ± 22.8 | 33.5 ± 16.6 | 45.6 ± 24.9 | < 0.001 |
GOLD category, n % | 0.283 | |||
II | 179 (46) | 76 (50) | 103 (44) | |
III | 169 (43) | 65 (42) | 104 (44) | |
IV | 41 (11) | 12 (8) | 29 (12) | |
Charlson comorbidity index, n (%) | 0.011 | |||
1 | 225 (58) | 99 (65) | 126 (53) | |
2 | 93 (24) | 38 (25) | 55 (23) | |
3 | 46 (12) | 12 (8) | 34 (15) | |
4 | 25 (6) | 4 (2) | 21 (9) | |
Experienced > 2 exacerbations, n (%) | 75 (20) | 38 (25) | 37 (16) | 0.036 |
FEV1 (L) | 1.5 ± 0.5 | 1.3 ± 0.4 | 1.7 ± 0.5 | < 0.001 |
FEV1 (% pred.) | 48.7 ± 14.0 | 49.6 ± 13.5 | 48.1 ± 14.4 | 0.315 |
FVC (L) | 3.3 ± 0.9 | 2.7 ± 0.6 | 3.7 ± 0.8 | < 0.001 |
FVC (% pred.) | 85.5 ± 16.6 | 85.2 ± 17.1 | 85.6 ± 16.4 | 0.791 |
FEV1/FVC (%) | 45.7 ± 11.1 | 47.6 ± 11.0 | 44.5 ± 11.0 | 0.006 |
TLC (L) | 7.1 ± 1.4 | 6.1 ± 0.9 | 7.8 ± 1.3 | < 0.001 |
TLC (% pred.) | 115.9 ± 18.0 | 121.4 ± 17.8 | 112.3 ± 17.1 | < 0.001 |
IC (L) | 2.4 ± 0.7 | 2.0 ± 0.5 | 2.7 ± 0.7 | < 0.001 |
IC/TLC ratio | 0.35 ± 0.09 | 0.36 ± 0.08 | 0.33 ± 0.09 | 0.002 |
TLCO | 5.2 ± 1.9 | 4.4 ± 1.6 | 5.6 ± 2.0 | < 0.001 |
TLCO (% pred.) | 59.1 ± 18.8 | 57.2 ± 18.5 | 60.3 ± 19.0 | 0.143 |
Physical activity ≥1 h/week | ||||
Light physical activity | 263 (73.0) | 104 (73.7) | 159 (72.6) | 0.691 |
Hard physical activity | 141 (39.6) | 54 (38.9) | 88 (40.6) | 0.139 |