IL6 and Sepsis: In patients with severe sepsis there was a significant association between sequential organ failure assessment (SOFA) scores and serum IL6 protein levels at ICU admission and 7 days after admission (admission P < 0.001, Spearman ρ = 0.796, n = 49; day 7 P < 0.001, Spearman ρ = 0.812, n = 30).