El 1. Adiposity as predictorModel 2. Leptin as an independent predictorModel 3. Leptin as predictorModel 4. C-peptide of insulinModel 5. Linear growth velocitywere applied to adjust for urinary concentration [37]. The intra-assay coefficient of variation for the high control was 13.4 and for the low controls 13.8 . Inter-assay coefficients of variation were 10.1 for high and 15.7 for low contro