Fig. 4

Incremental value of serum biomarkers for identifying arteriosclerosis in patients with OSA in the logistic regression models. Model 1 included age, gender, body mass index, SBP, FBG and smoking; Model 2 included Model 1 plus AHI; Model 3 included Model 2 plus AOPP; Model 4 included Model 3 plus IL-6; Model 5 included Model 4 plus GDF15. OR, odds ratio; CI, confidence interval; SBP, systolic blood pressure; FBG, fasting blood glucose; AHI, apnea–hypopnea index; AOPP, advanced oxidation protein products; IL-6, interleukin-6; GDF15, growth differentiation factor 15