CD4 and obstructive sleep apnea syndrome: The NLR, lymphocytes, and CD4 counts had a moderate diagnostic value for OVS in OSA patients, with AUCs of 0.708 (95% CI, 0.614–0.802), 0.719 (95% CI, 0.624–0.813), and 0.744 (95% CI, 0.653–0.834), respectively.