Higher intraoperative blood loss (26.4% vs. 45.0%, relative risk: 0.587, 95% confidence interval: 0.334–0.977), lower serum albumin levels (11.9% vs. 29.4%, relative risk: 0.405, 95% confidence interval: 0.160–0.966) and the prevalence of diabetes (12.5% vs. 30.8%, relative risk: 0.431, 95% confidence interval: 0.269–0.862) were also associated with higher SSI incidence in the 10% povidone‐iodine group. This evidence concerns the gene ALB and diabetes mellitus.