CXCL8 and obstructive sleep apnea syndrome: While no significant differences were found in SOD activity (0.29 vs. 0.31 U/mL) or lipid peroxidation between OSA patients and healthy controls, suggesting a lack of major oxidative stress imbalance, levels of IL-8 and GCP-2 were significantly elevated in OSA patients (198.8 vs. 180.83 pg/mL and 383.34 vs. 218 pg/mL, respectively).