Table 3

Association between history of hypertension and stroke, by number of antihypertensive agents preadmission

OverallAll strokeIschaemic strokeIntracerebral haemorrhage
OR (99% CI)PAR (99% CI)OR (99% CI)PAR (99% CI)OR (99% CI)PAR (99% CI)
No antihypertensive5.26 (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 used2.91 (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 used2.16 (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.