| Characteristic | Whole sample (N = 8881), n % | Not on DAT (n = 8465), n % | On DAT (n = 416), n % |
|---|---|---|---|
| Sex | |||
| Male | 5024 (56.6) | 4738 (56.0) | 286 (68.8) |
| Female | 3857 (43.4) | 3727 (44.0) | 130 (31.3) |
| Age group, years | |||
| 18–74 | 4581 (51.6) | 4364 (51.6) | 217 (52.2) |
| ≥75 | 4300 (48.4) | 4101 (48.4) | 199 (47.8) |
| Ethnicity | |||
| White | 5628 (63.4) | 5406 (63.9) | 222 (53.4) |
| South Asian | 1069 (12.0) | 976 (11.5) | 93 (22.4) |
| Black | 1186 (13.4) | 1137 (13.4) | 49 (11.8) |
| Unknowna | 998 (11.2) | 946 (11.2) | 52 (12.5) |
| IMD quintile | |||
| 1 (least deprived) | 1782 (20.1) | 1716 (20.3) | 66 (15.9) |
| 2 | 1784 (20.1) | 1705 (20.1) | 79 (19.0) |
| 3 | 1765 (19.9) | 1675 (19.8) | 90 (21.6) |
| 4 | 1774 (20.0) | 1682 (19.9) | 92 (22.1) |
| 5 (most deprived) | 1774 (20.0) | 1686 (19.9) | 88 (21.2) |
| Unknown | 2 (0.02) | 1 (0.1) | 1 (0.2) |
| Clinical features | |||
| IHD, stroke, or TIA | 3177 (35.8) | 2837 (33.5) | 340 (81.7) |
| Diabetes or CKD | 4389 (49.4) | 4118 (48.6) | 271 (65.1) |
| Upper GI bleeding | 111 (1.2) | 105 (1.2) | 6 (1.4) |
| PPI/H2RA | — | — | 351 (84.4) |
| DAT prescribed >12 months | — | — | 274 (65.9) |
| Systolic blood pressure, mmHg | |||
| <140 | 6682 (75.2) | 6356 (75.1) | 326 (78.4) |
| ≥140 | 1262 (14.2) | 1175 (13.9) | 87 (20.9) |
| Missing | 337 (3.8) | 334 (3.9) | 3 (0.7) |
| Smoking status | |||
| Never smoked | 3944 (44.4) | 3765 (44.5) | 179 (43.0) |
| Ex-smoker | 2742 (30.9) | 2602 (30.7) | 140 (33.7) |
| Current smoker | 792 (8.9) | 737 (8.7) | 55 (13.2) |
| Unknown | 1403 (15.8) | 1361 (16.1) | 42 (10.1) |
| BMI, kg/m2 | |||
| <20 | 725 (8.2) | 693 (8.2) | 32 (7.7) |
| 20–29 | 3733 (42.0) | 3559 (42.0) | 174 (41.8) |
| ≥30 | 3002 (33.8) | 2832 (33.5) | 170 (40.9) |
| Unknown | 1421 (16.0) | 1381 (16.3) | 40 (9.6) |
| Median (IQR) | 28.4 (24.6–32.9) | 28.3 (24.6–32.9) | 29.3 (25.5–33.4) |
aEthnicity not stated or missing. AF = atrial fibrillation. BMI = body mass index. CKD = chronic kidney disease. DAT = dual antithrombotic therapy. GI = gastrointestinal. H2RA = H2-receptor antagonist. IHD = ischaemic heart disease. IMD = Index of Multiple Deprivation. IQR = interquartile range. PPI = proton pump inhibitor. TIA = transient ischaemic attack.