IL10 and obstructive sleep apnea syndrome: Twelve studies were based on a comparison of the serum IL-10 concentrations between OSAHS patients with an average AHI < 30 and the control group, and the outcomes indicated that serum IL-10 concentrations in these patients were not significant different when compared with subjects of the control group (SMD = 0.18, 95% CI = −0.29 to 0.66, P = .447, Table 3).