TABLE 2.
Pulmonary function tests and GOLD classification.
| All | OS group | COPD group | p Value | |
|---|---|---|---|---|
| n = 237 | n = 79 | n = 158 | ||
| FEV1/FVC ratio (%) | 55.2 ± 15.7 | 58.7 ± 16.8 | 53.4 ± 14.9 | 0.015 |
| FEV1% predicted | 42.0 ± 19.7 | 44.6 ± 19.4 | 40.8 ± 19.8 | 0.109 |
| Severity of COPD, n (%) | ||||
| GOLD 1 | 14 (5.9) | 4 (5.1) | 10 (6.3) | 0.779 |
| GOLD 2 | 67 (28.3) | 27 (34.2) | 40 (25.3) | 0.153 |
| GOLD 3 | 74 (31.2) | 24 (30.4) | 50 (31.6) | 0.843 |
| GOLD 4 | 82 (34.6) | 24 (30.4) | 58 (36.7) | 0.334 |
FEV1, orced expiratory volume in 1 s; FVC, forced vital capacity; GOLD, Global Initiative for Chronic Obstructive Lung Disease; other abbreviations as in Table 1.