CYBA and obstructive sleep apnea syndrome: Interactions between polymorphisms within genes involved in the reduction of daytime sleepiness in OSA patients were investigated using the logistic regression analysis and the results showed a significant relationship between rs841 and A930G p22phox in two genotypes combination (Crude OR = 0.16, 95% CI = 0.02–0.98; P = 0.04 and Crude OR = 0.09, 95% CI = 0.009–0.97; P = 0.04, after adjustment for age, gender, BMI OR = 0.11, 95% CI = 0.01–0.