Characteristics of patients in study (N = 304 937)
| Characteristic | n | % |
|---|---|---|
| Sex | ||
| Male | 150 081 | 49.2 |
| Female | 154 856 | 50.8 |
| Ethnicity | ||
| White | 147 205 | 48.3 |
| Asian | 7541 | 2.5 |
| Chinese | 688 | 0.2 |
| Black | 5140 | 1.7 |
| Other/mixed | 5814 | 1.9 |
| Unknown | 138 549 | 45.4 |
| Age | ||
| <5 | 19 388 | 6.4 |
| 5–14 | 34 356 | 11.3 |
| 15–24 | 36 874 | 12.1 |
| 25–44 | 85 075 | 27.9 |
| 45–64 | 76 500 | 25.1 |
| 65–74 | 27 676 | 9.1 |
| >74 | 25 068 | 8.2 |
| IMD | ||
| Lowest quintile | 65 582 | 21.5 |
| 2nd quintile | 65 758 | 21.6 |
| 3rd quintile | 58 879 | 19.3 |
| 4th quintile | 59 333 | 19.5 |
| 5th quintile | 48 976 | 16.1 |
| Unknown | 6409 | 2.1 |
| Smoking status | ||
| Non-smoker | 111 584 | 36.6 |
| Current smoker | 50 276 | 16.5 |
| Ex-smoker | 49 323 | 16.2 |
| Unknown | 93 754 | 30.8 |
IMD = Index of Multiple Deprivation.