Frequency of equivocation in surgical meta-evidence: a review of systematic reviews within IBD literature.

Objective: To assess the level of equivocation among level 1 evidence in ulcerative colitis and Crohn's disease and determine whether any predisposing factors are present.

Method: MEDLINE, Embase, CINHAL and Cochrane were searched from 2006 to 2017. Papers were scored using AMSTAR and categorised into surgical (S), medical (M) or medical and surgical (MS) groups.