Document Classification

Section Type: METHODS

Text: We examined estimates of insulin sensitivity [1/fasting insulin (1/I (F)), fasting glucose/insulin (G (F) / I (F)), 1/fasting C-peptide (1/C (F)), G (F) / C (F)], - cell function [insulinogenic index (I30/G30), and C30/G30], and disposition index (DI) in the TODAY cohort of 704 youth (14. 0 2. 0 yr ; diabetes duration 7. 8 5. 8 months ; 64. 9 % female ; 41. 1 % Hispanic, 31. 5 % Black, 19. 6 % White, 6. 1 % American Indian, and 1. 7 % Asian) according to hemoglobin A1c (HbA1c) quartiles at study randomization.