|Weighted events rate|
|Outcomes||Number of comparisons (n)||Antibiotics||Placebo||RRR (95% CI)||NNT (CI)|
|*Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. A fixed effects model was used for all analyses. Follow up data were not consistently reported in individual trials.|
|Wound infection||71 (8643)||5.3%||14.6%||60% (55 to 65)||11 (10 to 13)|
|Intra-abdominal abscess||20 (4468)||0.7%||1.7%||51% (18 to 70)||100 (59 to 334)|
Review: antibiotics reduce wound infections and intra-abdominal abscesses in patients having appendectomy
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