Figure 4.

Relationship between insulin secretory rate and A, plasma glucose levels, B, rate sensitivity, C, potentiation factor ratio, and intact D, glucagon-like peptide 1 concentrations in adult African Americans (AA) and non-Hispanic whites (NHW) during a mixed meal test (MMT). Data shown are mean ± SEM. In panel A, P values for the effects of racial group and time and the race*time interaction were obtained with repeated-measures ANOVA with post-hoc Bonferroni test. Comparisons between groups in panel B were assessed by independent unpaired t test or the Wilcoxon-Mann-Whitney test.