ROC curves for different waist circumferences in relation to insulin resistance. panel A: HOMA-IR ≥ 1.50; panel B: HOMA-IR ≥ 2.00; and panel C: HOMA-IR ≥ 2.50. ROC curves are shown for waist circumferences of 80 cm (blue line), 85 cm (red line), and 90 cm (green line). Logistic regression analysis was used with adjustment for age, rank in the Self-Defense Forces, smoking, and alcohol use. ROC, receiver operating characteristics; HOMA-IR, homeostasis model assessment of insulin resistance.