LEP and chronic kidney disease: In supplementary analyses, when we repeated the multivariable models in Table 2 and 3 additionally adjusting for medication use, the effect estimates were largely similar; compared with quartile 1 of leptin, the multi-variable OR (95% CI) of CKD was 1.36 (0.92–2.02), 2.32 (1.53–3.53) and 5.55 (3.24–9.51) in quartiles 2, 3 and 4; corresponding estimates for adiponectin were, 1.44 (1.01–2.07), 1.55 (1.07–2.25), 1.96 (1.32–2.93) in quartiles 2, 3 and 4.