Odds ratios and 95% confidence interval for metabolic syndrome according to snoring frequency (n = 1003).

aExcluding 140 participants who met the criteria for type 2 diabetes during the physical examinations;Model 1: adjusted for age, sex, smoking, alcohol drinking, physical activity, education, family history of chronic diseases, marital status, annual income, self-rated health status, depressive symptoms, sleep quality and duration;Model 2: model 1 plus BMI;Model 3: model 2 plus inflammatory markers (CRP, LBP, IL-6 and IL-18) and adipokines (HMW-adiponectin and leptin).Abbreviations: BMI = body mass index; CRP = C-reactive protein; HDL = high-density lipoprotein; HMW-adiponectin = high-molecular-weight adiponectin; IL = Interleukin; LBP = Lipopolysaccharide-binding protein.