In consistency with the previous results, leptin levels are significantly correlated with several indices of OSAHS severity, i.e. AHI, percentage of sleep time with less than 90% hemoglobin saturation (%T90), oxygen desaturation index, as well as with a variety of anthropometric measurements, including BMI, waist-to-hip ratio (WHR), and skinfold thickness [68-70,72,75,83,84]. The gene discussed is LEP; the disease is obstructive sleep apnea syndrome.