Basic characteristics of all pooled studies in the meta-analysis.

NA, not available; No., number; †: upper ends of follow-up range; ‡: range of follow-up; liver: all the patients in the study only underwent liver resection; liver/simul: a portion of patients in the study underwent liver resection and the other patients underwent synchronous hepatectomy and colectomy; simul: all the patients in the study underwent synchronous hepatectomy and colectomy; All study design was case-control.