Observational and randomized data comparing medical therapies were consistent, however, in suggesting that anticoagulants are superior to antiplatelets for preventing stroke recurrence (incidence rate ...

We compared the relative risks and absolute risk differences for specific harms in the randomized and nonrandomized studies. Results: Eligible nonrandomized studies were found for 15 harms for which ...

Guowei Li, Anne Holbrook, Yanling Jin, Yonghong Zhang, Mitchell A. H. Levine, Lawrence Mbuagbaw, Daniel M. Witt, Mark Crowther, Stuart Connolly, Chatree Chai-Adisaksopha, Zhongxiao Wan, Ji Cheng, ...