Characteristics of the 3 data sets used
| Characteristic | Data set; % of patients* | ||
|---|---|---|---|
| Development (2015) | Validation (2015) | Validation (2011) | |
| Sex | |||
| Male | 48.9 | 49.4 | 49.2 |
| Female | 51.1 | 50.6 | 50.8 |
| Age at index date, yr | |||
| Mean ± SD | 50.7 ± 17.6 | 51.0 ± 17.8 | 50.1 ± 17.3 |
| Range | 21–95 | 21–95 | 21–95 |
| > 65 yr | 22.7 | 23.8 | 20.6 |
| > 80 yr | 5.8 | 6.0 | 5.1 |
| Deprivation quintiles (IMD 2010) | |||
| 1 (least deprived) | 25.9 | 29.8 | 20.3 |
| 2 | 24.5 | 19.3 | 20.3 |
| 3 | 19.1 | 17.5 | 20.8 |
| 4 | 16.6 | 18.0 | 22.6 |
| 5 (most deprived) | 13.9 | 15.4 | 16.0 |
| Multimorbidity | |||
| No. of conditions, mean ± SD | 1.3 ± 1.7 | 1.3 ± 1.8 | 1.2 ± 1.7 |
| No. of conditions, range | 0–15 | 0–15 | 0–15 |
| With 0 conditions | 45.0 | 43.3 | 46.9 |
| With 1 condition | 23.3 | 23.5 | 23.4 |
| With ≥ 2 conditions | 31.7 | 33.2 | 29.7 |
Note: IMD = Index of Multiple Deprivation, SD = standard deviation.
↵* Except where indicated otherwise.