Table 2. Cohort description using the latest recorded value for all adult patients who were registered at a general practice at any point between January 2019 and December 2021.
| Characteristic | Category | Number of adult patients (% of total population) |
|---|---|---|
| Total | 48,352,770 (100.0) | |
| Age | 18–19 | 1,398,430 (2.9) |
| 20–29 | 7,685,615 (15.9) | |
| 30–39 | 8,753,520 (18.1) | |
| 40–49 | 7,754,940 (16.0) | |
| 50–59 | 8,025,250 (16.6) | |
| 60–69 | 6,316,120 (13.1) | |
| 70–79 | 5,068,760 (10.5) | |
| 80+ | 3,350,125 (6.9) | |
| Missing | 20 (<0.1) | |
| Sex | M | 24,002,030 (49.6) |
| F | 24,350,740 (50.4) | |
| Ethnicity | South Asian | 3,148,455 (6.5) |
| Black | 1,333,335 (2.8) | |
| Mixed | 604,600 (1.3) | |
| Other | 1,039,730 (2.2) | |
| White | 27,900,210 (57.7) | |
| Missing | 14,326,440 (29.6) | |
| IMD quintile | Most deprived | 9,352,000 (19.3) |
| 2 | 10,061,470 (20.8) | |
| 3 | 9,788,670 (20.2) | |
| 4 | 9,379,320 (19.4) | |
| Least deprived | 9,241,205 (19.1) | |
| Missing | 530,100 (1.1) | |
| Region | East | 5,222,485 (10.8) |
| Midlands | 8,931,820 (18.5) | |
| London | 8,499,335 (17.6) | |
| North East | 5,897,280 (12.2) | |
| North West | 7,421,095 (15.3) | |
| South East | 7,671,845 (15.9) | |
| South West | 4,706,435 (9.7) | |
| Missing | 2,455 (<0.1) | |
| EHR provider | TPP | 28,765,400 (59.5) |
| EMIS | 19,587,370 (40.5) | |
IMD: index of multiple deprivation, EHR: electronic health record.