Table 1 COPDGene study subjects
From: Paired inspiratory-expiratory chest CT scans to assess for small airways disease in COPD
All subjects | Severe emphysema‡ | No emphysema§ | |
|---|---|---|---|
N | 8517 | 1188 | 5769 |
Age | 59.6 (9.0) | 65.5 (7.7) | 57.6 (8.6) |
Sex | |||
Male | 4535 (53.2%) | 711 (59.8%) | 2849 (49.4%) |
Female | 3982 (46.8%) | 477 (40.2%) | 2920 (50.6%) |
Race | |||
African American | 2668 (31.3%) | 190 (16.0%) | 2156 (37.4%) |
White | 5849 (68.7%) | 998 (84.0%) | 3613 (62.6%) |
Current smoking | 4463 (52.4%) | 259 (21.8%) | 3547 (61.5%) |
Pack-years of smoking | 44.3 (24.8) | 55.4 (27.8) | 40.8 (22.6) |
GOLD Stage | [54 missing]† | [3 missing]† | [40 missing]† |
0 | 3674 (43.4%) | 17 (1.4%) | 3241 (56.6%) |
1 | 668 (7.9%) | 47 (4.0%) | 414 (7.2%) |
2 | 1636 (19.3%) | 263 (22.2%) | 870 (15.2%) |
3 | 965 (11.4%) | 458 (38.7%) | 217 (3.8%) |
4 | 502 (5.9%) | 396 (33.4%) | 33 (0.6%) |
Unclassified* | 1018 (12.0%) | 4 (0.3%) | 954 (16.7%) |