Medical therapy (calcium channel blockers or α blockers) v no medical therapy for urolithiasis at 15–48 days*

OutcomeNumber of trials (n)Weighted event ratesWeighted RBI (95% CI)NNT (CI)
Medical therapyNo medical therapy
*Abbreviations defined in glossary.
†Weighted event rate and CI for NNT calculated from data in article. A fixed effects model was used.
Urinary stone passage9 (693)78%†47%65% (45 to 88)4 (3 to 4)