Baseline data of the study groups.

Skewed data are presented as medians (interquartile range) and categorical data as numbers (percentage). Differences in baseline characteristics were determined using Student’s t-tests, Fisher’s exact tests or χ2 tests according to the data distribution characteristics.Abbreviations: BMI, body mass index; WHR, waist circumference/hip circumference ratio; TG, triglyceride; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol; apoE, apolipoprotein E; AHI, apnea-hypopnea index.Baseline data of the study groups.