IL6 and infection: The level of sIL-2R was positively correlated with CRP, SAA, IL-6, APACHE II, and the SOFA score in the infection group (r = 0.396, p < 0.001; r = 0.314, p < 0.008; r = 0.262, p = 0.028; r = 0.302, p = 0.011; and r = 0.348, p = 0.003, respectively).