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)

低偏倚风险（risk of bias）研究中，对比腹腔镜阑尾切除术（laparoscopic appendectomy）与开腹阑尾切除术（open appendectomy）的临床试验，其腹腔内脓肿（intra-abdominal abscess）结局下的合并比值比（pooled odds ratio）。低偏倚风险研究中，对比腹腔镜阑尾切除术与开腹阑尾切除术的临床试验，其腹腔内脓肿结局下的累积比值比（cumulative odds ratio）。高偏倚风险研究中，对比腹腔镜阑尾切除术与开腹阑尾切除术的临床试验，其腹腔内脓肿结局下的合并比值比。高偏倚风险研究中，对比腹腔镜阑尾切除术与开腹阑尾切除术的临床试验，其腹腔内脓肿结局下的累积比值比。(ZIP 1902 KB)