IL-6 levels in patients with infection were significantly higher (p = 0.01) both on the second postoperative day (OR = 6.91; 95% CI: 1.06-45.22; p = 0.04) and on the fifth postoperative day (OR = 14.64; 95% CI: 1.90-113.04; p = 0.01), even when LOS entered as a covariable (Table 4 and Figure 1E). Here, IL6 is linked to infection.