Association between history of hypertension and stroke, by number of antihypertensive agents preadmission
| Overall | All stroke | Ischaemic stroke | Intracerebral haemorrhage | |||
| OR (99% CI) | PAR (99% CI) | OR (99% CI) | PAR (99% CI) | OR (99% CI) | PAR (99% CI) | |
| No antihypertensive | 5.26 (4.53 to 6.11) | 16.5% (15.3 to 17.7) | 4.77 (4.00 to 5.69) | 14.3% (13.0 to 15.7) | 6.96 (5.62 to 8.62) | 24.1% (16.8 to 31.4) |
| 1 Agent used | 2.91 (2.56 to 3.31) | 14.1% (12.7 to 15.4) | 2.93 (2.52 to 3.41) | 13.9% (12.1 to 15.7) | 3.38 (2.77 to 4.12) | 15.9% (8.6 to 23.2) |
| ≥ 2 Agents used | 2.16 (1.86 to 2.50) | 7.9% (6.4 to 9.3) | 2.35 (1.99 to 2.78) | 9.6% (8.0 to 11.2) | 1.70 (1.30 to 2.24) | 3.2% (-9.4 to 15.9) |
Multivariable model including age, smoking, WHR, diabetes, physical activity, alternate healthy eating index, alcohol intake, psychosocial factors, apolipoproteins and cardiac risk factors. Reference category is individuals with no prior hypertension or hypertension on interview blood pressure.
PAR, population attributable risk.