Table 3. Population attributable risks of presumed etiological factors for any stroke (n/N = 1,020/6,844).
| Etiological Factor | Stratum | Prevalence (Percent) | Hazard Ratio (95% CI)a | PAR (95% CI)a per Stratum | PAR (95% CI)a Combined |
| Hypertension | Prehypertension | 29.9 | 1.33 (1.06–1.67) | 0.06 (0.02–0.11) | 0.36 (0.26–0.49) |
| Stage I | 25.0 | 1.72 (1.38–2.16) | 0.12 (0.07–0.16) | ||
| Stage II | 14.0 | 2.00 (1.57–2.55) | 0.09 (0.07–0.13) | ||
| Treated controlled | 5.5 | 1.89 (1.37–2.59) | 0.03 (0.02–0.05) | ||
| Treated uncontrolled | 7.3 | 2.18 (1.66–2.86) | 0.06 (0.04–0.09) | ||
| Smoking | Former light | 18.2 | 1.12 (0.93–1.36) | 0.02 (0.00–0.09) | 0.16 (0.10–0.26) |
| Former heavy | 22.6 | 1.30 (1.07–1.57) | 0.05 (0.03–0.11) | ||
| Current light | 9.9 | 1.58 (1.27–1.98) | 0.04 (0.02–0.07) | ||
| Current heavy | 12.4 | 1.65 (1.32–2.06) | 0.05 (0.03–0.07) | ||
| Diabetes mellitus | Present | 10.3 | 1.43 (1.20–1.71) | 0.04 (0.02–0.07) | |
| Atrial fibrillation | Present | 5.0 | 1.47 (1.15–1.89) | 0.02 (0.01–0.05) | |
| Coronary disease | Present | 10.0 | 1.11 (0.91–1.36) | 0.01 (0.00–0.08) | |
| BMI | Overweight (25–30 kg/m2) | 45.4 | 1.00 (0.87–1.15) | 0.00 (0.00–1.00) | 0.01 (0.00–0.92) |
| Obese (>30 kg/m2) | 16.6 | 1.07 (0.89–1.28) | 0.01 (0.00–0.17) | ||
| Total | 0.51 (0.41–0.62) |
a
All analyses are adjusted for age, sex, hypertension, smoking, diabetes mellitus, atrial fibrillation, coronary disease, and overweight/obesity, if appropriate. All HRs are relative to those in whom the etiological factor is not present.