Lifetime prevalence of chronic obstructive pulmonary disease (COPD) by socioeconomic status (quintile of Townsend score).
| Year and Townsend quintile | Total patients | Patients with COPD | Crude % | Age–sex-standardised % (95% CI) | Change in standardised rate (from 2001) |
|---|---|---|---|---|---|
| 2001 | |||||
| 1 (most affluent) | 634 434 | 5 828 | 9.2 | 8.3 (8.1 to 8.5) | N/A |
| 2 | 565 812 | 6 141 | 10.9 | 9.8 (9.5 to 10.0) | N/A |
| 3 | 536 218 | 7 232 | 13.5 | 12.4 (12.1 to 12.7) | N/A |
| 4 | 497 925 | 8 588 | 17.3 | 17.2 (16.9 to 17.6) | N/A |
| 5 (most deprived) | 535 216 | 11 705 | 21.9 | 24.8 (24.4 to 25.3) | N/A |
| 2005 | |||||
| 1 (most affluent) | 648 634 | 7 861 | 12.1 | 10.2 (10.0 to 10.5) | 1.9 |
| 2 | 580 431 | 8 084 | 13.9 | 12.1 (11.8 to 12.4) | 2.3 |
| 3 | 552 702 | 9 664 | 17.5 | 16.2 (15.8 to 16.5) | 3.8 |
| 4 | 515 271 | 10 784 | 20.9 | 22.0 (21.6 to 22.5) | 4.8 |
| 5 (most deprived) | 567 835 | 14 219 | 25.0 | 31.1 (30.6 to 31.7) | 6.3 |
N/A = not applicable.