IGF1 and obstructive sleep apnea syndrome: The outcomes revealed that regardless of mean AHI score, there were no major variations in plasma IGF-1 levels between patients in the OSAHS and control groups (SMD=-1.32, 95%CI= -2.64–0.005, P=0.05; SMD=-0.82, 95%CI=-3.01–1.37, P=0.46, Table 4).