The median IL-8 levels on the first and third days of patients with ARDS were 176.6 (303.75 ± 223.08) and 90.2 (118 ± 76.55) ng/L, respectively, and the IL-8 levels on the first and third days of patients without ARDS were 61.5 (129.82 ± 149.46) and 43.2 (85.64 ± 93.62) ng/L, respectively. This evidence concerns the gene CXCL8 and acute respiratory distress syndrome.