EGF and colorectal carcinoma: Stratified analyses by sex indicated that EGF A61G correlated with the increased risk of CRC amongst female group (GG vs AA: OR: 1.87; 95% CI: 1.19–2.93; P=0.007), but not amongst male group (GG vs AA: OR: 2.76; 95% CI: 0.96–7.93; P=0.059).