IL10 and obstructive sleep apnea syndrome: Five studies were based on serum IL-10 concentrations of patients with an average BMI ≥ 30, and the outcomes of the analysis suggested that serum IL-10 levels did not differ from those of healthy controls in patients with OSAHS (SMD = −0.32, 95% CI = −1.04 to 0.41, P = .389).