Fig. 5.

Summary risk estimates reported for the association between hormone use and proximal colon cancer by subgroup. ^aEstimates were log-transformed prior to generation of the pooled estimate; ^bExcluding Lin 2007 [54] for which an association but no specific risk estimate was reported. CI Confidence interval, HRT Hormone Replacement Therapy, HR Hazard Ratio, I² test for heterogeneity between studies within subgroups, Meta-regression p-value p-value for evidence of between subgroup heterogeneity