Blood pressure lowering treatment v placebo in older patients with isolated systolic hypertension to prevent any major CVD event per 100 patient years‡
| CVD risk group | Treatment | Placebo | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| ‡CVD = cardiovascular disease. Other abbreviations defined in glossary; RRR and CIs calculated from data in article, and event rates and CIs for NNT provided by author. | ||||
| 1st quartile | 1.9 | 2.5 | 25% (–14 to 51) | Not significant |
| 2nd quartile | 2.6 | 3.6 | 29% (1 to 49) | 100 (58 to 2485) |
| 3rd quartile | 3.0 | 5.2 | 43% (24 to 57) | 48 (35 to 86) |
| 4th quartile | 4.3 | 7.2 | 40% (19 to 56) | 37 (26 to 77) |