Characteristics of subjects stratified by Global initiative for chronic Obstructive Lung Disease(GOLD) stage
| GOLD Stage | ||
| 0 | 1–4 | |
| Subjects n | 10 | 12# |
| Age yr | 71.0 (5.4) | 62.2 (9.7)* |
| Males % | 50 | 50 |
| Pack-yrs | 42.8 (10.7) | 55.2 (34.9) |
| FVC L | 3.4 (1.2) | 3.2 (1.0) |
| FEV1 L | 2.5 (0.9) | 1.8 (0.8) |
| FEV1 % predicted | 90.0 (13.1) | 64.8 (23.6)** |
| FEV1/FVC % | 76.9 (7.5) | 55.4 (11.8)** |
Data are presented as mean (se), unless otherwise stated. FVC: forced vital capacity; FEV1: forced expiratory volume in one second. #: GOLD 1, n = 4; GOLD 2, n = 4; GOLD 3, n = 3; GOLD 4, n = 1. *: p<0.05; **: p<0.01, compared with GOLD 0 subjects.