Figure 2

Receiver Operating Curve (ROC) analyses for leptin levels as a predictor of metabolic syndrome. ROC analysis was undertaken in (a) men, and (b) women. a-1 and b-1, Leptin vs. Metabolic syndrome without adjustment. a-2 and b-2, age-adjusted. a-3 and b-3, age and tobacco usage-adjusted. a-4 and b-4, age, tobacco usage, and BMI-adjusted. The area under the ROC curves were 0.676 (SE = 0.022), 0.907 (SE = 0.012), 0.906 (SE = 0.012), and 0.900 (SE = 0.013) in men and 0.627 (SE = 0.035), 0.729 (SE = 0.035), 0.735 (SE = 0.035), and 0.714 (SE = 0.035) in women.