Aspirin v placebo for primary prevention of vascular events at mean follow up of 4.6 yearsâ€
| Outcomes | Number of studies | Patients | Relative risk (95% CI) | NNT (CI) |
|---|---|---|---|---|
| †Abbreviations defined in glossary: NNT and CI calculated from data provided by author. | ||||
| Myocardial infarction | 5 | All | 0.74 (0.68 to 0.82) | 115 (91 to 164) |
| All cause mortality | 5 | All | 0.94 (0.87 to 1.01) | Not significant |
| Stroke | 5 | All | 1.08 (0.95 to 1.24) | Not significant |
| Haemorrhagic stroke | 4 | All | 1.35 (0.88 to 2.10) | Not significant |
| Vascular death | 5 | All | 0.93 (0.93 to 1.03) | Not significant |