“…BMI was added sequentially after age and sex in model 2. Lifestyle variables (total calorie intake, sleep duration, smoking, alcohol, education level) were added to model 3, and comorbidities (diabetes mellitus (DM), cardiovascular disease, hypertension, and arthritis) were further added to model 4, and finally central obesity was added to model 5, according to their established associations with physical activity and NAFLD and clinical relevance [3,9,10,12,16,22,23,24,25,26]. All analyses were performed by the complex sample procedures of SPSS (version 24; IBM/SPSS Inc., Armonk, NY, USA) to account for the complex sampling design.…”