IL6 and infection: PCT level > 1.39 ng/mL (odds ratio [OR]: 4.23, 95% confidence interval [CI]: 1.15–15.63) and IL-6 level > 84.00 pg/mL (OR: 21.81, 95% CI: 5.68–83.76) on POD 3 were independent predictors of postoperative infection in LGC (Table 4).