Fig. 1. Adjusted odds ratio of high insulin resistance (>75 percentile) by tertiles (T) of serum 25-hydroxyvitamin D (25(OH)D) and adiposity status. (A) General obesity was defined as a body mass index of 25 kg/m² or greater. (B) Abdominal obesity was defined as a waist circumference of 90 cm or greater for men and 85 cm or greater for women. Serum 25(OH)D was categorized into T. T1, first tertile; T2, second tertile; T3, third tertile. Model adjusted for age, gender, waist circumference, alcohol consumption, smoking status, physical exercise, season, and cohort. ^aP<0.05.