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Model estimates of β-cell function during an insulin-modified intravenous glucose test. X0 (A), Φ Basal (B), Φ 1 (C), Φ 2 (D), and Φ Total (E) in adult African Americans (AA) and non-Hispanic Whites (NHW). Data shown are mean ± SEM. Comparisons between groups were assessed by independent unpaired t-test or The Wilcoxon-Mann-Whitney test.
