Additional file 1: of Evidence of surgical outcomes fluctuates over time: results from a cumulative meta-analysis of laparoscopic versus open appendectomy for acute appendicitis

Pooled odds ratio in intra-abdominal abscess for trials comparing laparoscopic appendcetomy and open appendectomy among studies with low risk of bias. Cummulative odds ratio in intra-abdominal abscess comparing laparoscopic appendectomy and open appendectomy among studies with low risk of bias. Pooled odds ratio in intra-abdominal abscess for trials comparing laparoscopic appendcetomy and open appendectomy among studies with high risk of bias. Cummulative odds ratio in intra-abdominal abscess comparing laparoscopic appendectomy and open appendectomy among studies with high risk of bias. (ZIP 1902 kb)