IL6 and diabetes mellitus: However, diabetes status, preoperative serum creatine kinase (CK) levels, postoperative serum interleukin-6 (IL-6) levels at three days, and tumor necrosis factor-alpha (TNF-α) levels at three days are statistically associated with early LFCN injury, showing statistical significance (P < 0.05), as shown in Table 9.