CXCL8 and obstructive sleep apnea syndrome: We found that nine different interleukins including IL-1β, IL-2, IL-4, IL-6, IL-8, IL-12, IL-17, IL-18, and IL-23 were elevated to varying degrees in patients with OSA compared with controls, with the differences ranging from 0.82 to 100.14 pg/ml.