Dipyridamole plus aspirin (combination) or dipyridamole alone v control (including placebo) at 24–72 months*

OutcomeNumber of trials (n)ComparisonsRRR (95% CI)NNT (CI)
*Abbreviations defined in glossary; RRR, NNT, and CI calculated from odds ratio (adjusted for trial, age, sex, qualifying event [ischaemic stroke or transient ischaemic attack], and history of hypertension) in article.
Fatal and non-fatal stroke4 (10 146)Combination v control36% (27 to 46)24 (19 to 32)
1 (6602)Dipyridamole v control16% (0 to 29)53 (29 to ∞)