Table 1.
Baseline characteristics of haemorrhagic stroke case control study patients
| Cases n = 357 (%) | Controls n = 1631 (%) | |
|---|---|---|
| Age at index date (years) | ||
| ≤30 | 2 (0.6) | 6 (0.4) |
| >30–40 | 10 (2.8) | 49 (3.0) |
| >40–50 | 26 (7.3) | 129 (7.9) |
| >50–60 | 40 (11.2) | 197 (12.1) |
| >60–70 | 72 (20.2) | 344 (21.1) |
| >70–80 | 95 (26.6) | 463 (28.4) |
| >80 | 112 (31.4) | 443 (27.2) |
| Sex | ||
| Female | 232 (65.0) | 1,082 (66.3) |
| Male | 125 (35.0) | 549 (33.7) |
| Observation time in GPRD (quintiles) | ||
| 1 (<3.4 years) | 70 (19.6) | 307 (18.8) |
| 2 (3.4–6.3 years) | 82 (23.0) | 371 (22.8) |
| 3 (6.3–9.9 years) | 70 (19.6) | 326 (20.0) |
| 4 (9.9–13.2 years) | 68 (19.1) | 332 (20.4) |
| 5 (>13.2 years) | 67 (18.8) | 295 (18.1) |
| Smoking status | ||
| Non-smoker | 147 (41.2) | 712 (43.7) |
| Current smoker | 104 (29.1) | 376 (23.1) |
| Ex-smoker | 82 (23.0) | 491 (30.1) |
| Unknown status | 24 (6.7) | 52 (3.2) |
| Alcohol consumption | ||
| Non-drinker | 67 (18.8) | 280 (17.2) |
| Ex-drinker | 6 (1.7) | 10 (0.6) |
| Current drinker (amount unknown) | 6 (1.7) | 33 (2.0) |
| <2 units/day | 182 (51.0) | 972 (59.6) |
| 3–6 units/day | 25 (7.0) | 124 (7.6) |
| >6 units/day | 11 (3.1) | 20 (1.2) |
| Unknown status | 60 (16.8) | 192 (11.8) |
| BMI (kg m−2) | ||
| <20 | 27 (7.6) | 100 (6.1) |
| 20–25 | 106 (29.7) | 520 (31.9) |
| >25 | 143 (40.1) | 756 (46.4) |
| Unknown | 81 (22.7) | 255 (15.6) |
| Medical history | ||
| TIA/other stroke | 101 (28.3) | 147 (9.0) |
| Hypertension | 188 (52.7) | 673 (41.3) |
| Diabetes | 54 (15.1) | 209 (12.8) |
| Medication history | ||
| NSAIDs | 267 (74.8) | 1,166 (71.5) |
| Aspirin | 182 (51.0) | 592 (36.3) |
| Clopidogrel or dipyridamole | 44 (4.3) | 34 (3.6) |