Baseline demographics
| Characteristic | Control group | Intervention group |
|---|---|---|
| Practices | ||
| Surgeries, n | 1114 | 58 |
| CCGs, n | 30 | 1 |
| Total registered patients, n | 7 212 515 | 375 488 |
| Practice list size, mean n | 6474 | 6474 |
| Patients | ||
| Females aged 25–64 years, n, (%) | 1 869 553 (25.92) | 96 214 (25.62) |
| All aged <18 years, n, (%) | 1 483 480 (20.57) | 82 591 (22.00) |
| All aged 50 years, n, % | 2 641 058 (36.62) | 138 751 (36.95) |
CCG = clinical commissioning group.