Age and sex of the study populations (aged 15 years and over).
| MSGP 1991–1992 | GPRD 1991 | GPRD 2001 | RCGP WRS 2001 | CiPCA 2001 | England and Wales | |
|---|---|---|---|---|---|---|
| Number of persons | 376307a | 780354 | 1419667 | 264076 | 57589 | |
| Female (%) | 51.6 | 51.3 | 51.1 | 51 | 51.6 | 51.9 |
| Age, years (%) | ||||||
| 15–44 | 55.5 | 51.5 | 48.9 | 53.1 | 47.1 | 51 |
| 45–64 | 26.3 | 28.5 | 30.9 | 29.8 | 30.8 | 29.4 |
| ≥65 | 18.2 | 20 | 20.2 | 17.1 | 22.2 | 19.7 |
↵a Person-years.