Fig. 2From: Does transanal drainage tubes placement have an impact on the incidence of anastomotic leakage after rectal cancer surgery? a systematic review and meta-analysisA random-effect model was used to analyze the RRs of 7 articles to compare the association between transanal drainage tubes placement and the occurrence of anastomotic leakage after rectal cancer surgery. RR = 0.89, 95%CI 0.57–1.37, P = 0.58Back to article page