Table 1.
Potential impact fraction of systolic blood pressure to stroke by different scenarios.
| Systolic blood pressure (mmHg) | Current (factual) prevalence (%) | Hazard ratio | Counterfactual prevalence (%) | PIFa (%) | ||||
|---|---|---|---|---|---|---|---|---|
| 1st feasible minimum risk (scenario1) | 2st feasible minimum risk (scenario2) | Theoretical minimum risk (scenario3) | 1st feasible minimum risk (scenario1) | 1st feasible minimum risk (scenario2) | Theoretical minimum risk (scenario3) | |||
| <115 | 32 (26, 37) | 1 (Reference) | 32 (26, 37) | 32 (26, 37) | 44 (38, 49) | 3.5 | 7 | 22.05 |
| 115–140 | 48 (42, 53) | 2 (1.9, 2.1) | 54 (58, 60) | 59 (54, 65) | 56 (50, 61) | |||
| 140–160 | 17 (13, 22) | 5 (4.5, 5.5) | 12 (8, 16) | 8 (5, 11) | 0 | |||
| >160 | 3 (1, 5) | 7 (6, 8) | 2 (0.02, 3) | 0.08 (0, 2) | 0 | |||
a
At the first scenario, minimum risk for hypertension was considered as 5-mmHg hypothetical intervention on systolic blood pressure above 140 mmHg and DBP above 82 mmHg. The corresponding values for the second and third scenarios were 10-mmHg hypothetical intervention and zero prevalence, respectively.