Characteristics of the subgroups of patients with (current study population) and without COPD at entry date to the cohort
| Characteristics | COPD (N=14 350) | No COPD (N=150 416) |
|---|---|---|
| Age, mean (SD) | 54.70 (9.59) | 38.15 (12.31) |
| Female sex | 7377 (51.41) | 75 826 (50.41) |
| Socioeconomic status*, mean (SD) | 3.25 (1.35) | 3.09 (1.35) |
| Diabetes | 1508 (10.51) | 8647 (5.75) |
| Peptic ulcer disease | 1078 (7.51) | 3635 (2.42) |
| Renal disease | 1227 (8.55) | 5018 (3.34) |
| Rheumatological disease | 888 (6.19) | 3278 (2.18) |
| Cancer | 1249 (8.70) | 4670 (3.10) |
| Alcohol misuse | 1431 (9.97) | 10 535 (7.00) |
| Prior ischaemic heart disease | 2018 (14.06) | 6046 (4.02) |
| Prior stroke | 1073 (7.48) | 3353 (2.23) |
| Prior heart failure | 388 (2.70) | 671 (0.45) |
| Prior peripheral vascular disease | 531 (3.70) | 1277 (0.85) |
| Prior arrhythmia | 742 (5.17) | 2337 (1.55) |
| Prior depression | 5545 (38.65) | 53 167 (35.35) |
| Prior self-harm | 1563 (10.89) | 15 711 (10.45) |
Data are presented as N (percentage within drug group) unless stated otherwise.
*Townsend Index: 1 (lowest) to 5 (highest level of deprivation).24