Patient characteristics
| Variable | COPD, n (%) | No COPD, n (%) |
|---|---|---|
| Patients | 51 928 | 1 220 757 |
| Mean age, years (SD) | 65.1 (14.5) | 50.6 (16.4) |
| Males | 24 077 (46.4) | 598 005 (49.0) |
| Age group, years | ||
| 25–34 | 1964 (3.8) | 227 432 (18.6) |
| 35–44 | 3388 (6.5) | 275 605 (22.6) |
| 45–54 | 5961 (11.5) | 247 833 (20.3) |
| 55–64 | 11 077 (21.3) | 208 256 (17.1) |
| 65–74 | 14 634 (28.2) | 140 646 (11.5) |
| 75–84 | 11 551 (22.2) | 87 769 (7.2) |
| ≥85 | 3353 (6.5) | 33 216 (2.7) |
| Deprivation deciles | ||
| 1 Least deprived | 2486 (4.8) | 115 222 (9.4) |
| 2 | 3364 (6.5) | 123 286 (10.1) |
| 3 | 3637 (7.0) | 120 236 (9.8) |
| 4 | 5659 (10.9) | 146 235 (12.0) |
| 5 | 6622 (12.8) | 140 043 (11.5) |
| 6 | 6637 (12.8) | 136 648 (11.2) |
| 7 | 6588 (12.7) | 127 837 (10.5) |
| 8 | 4487 (8.6) | 102 982 (8.4) |
| 9 | 6971 (13.4) | 110 050 (9.0) |
| 10 Most deprived | 5477 (10.5) | 98 218 (8.0) |
COPD = chronic obstructive pulmonary disease. SD = standard deviation.