Fig. 3From: Does transanal drainage tubes placement have an impact on the incidence of anastomotic leakage after rectal cancer surgery? a systematic review and meta-analysisA fixed-effect model was used to analyze the RRs of 4 articles to compare the association between transanal drainage tubes placement and the occurrence of Grade B anastomotic leakage after rectal cancer surgery. RR = 1.30, 95%CI 0.79–2.14, P = 0.30Back to article page