IL6 and neoplasm: This analysis showed that low levels of IL-6 were significantly associated with a lower risk of presenting an unfavorable tumor histology (p = 0.048; OR = 0.17, 95% CI = 0.032–0.98) and that high levels were associated with a higher risk of death (p = 0.022; OR = 15.99, 95% CI = 1.49–171.2) (Table 3).