LEP and metabolic syndrome: In men, compared to the lowest leptin quartile, the odds ratio (OR) and 95% confidence intervals (95% CI) for metabolic syndrome after adjusting for age were 3.28 (2.06 - 5.20) in Q2, 5.12 (3.13 - 8.37) in Q3 and 6.14 (3.70 - 10.19) in Q4 (p < 0.001).