IL6 and acute respiratory distress syndrome: Our analysis of the correlations of the levels of cytokines with clinical data in patients with ARDS (Table 3) indicated that the IL-6 level had significant positive correlations with the levels PT, creatinine, BUN, cardiac troponin I (c-TnI), CK-MB, APACHE-II score, and SOFA score, and significant negative correlations with the levels of platelets, lymphocytes, and PaO2/FiO2.