(A): The ratio (GAD-alum ×3 to alum ×3) of treatment effect on 1 year stimulated C-peptide AUC mean within categories of pre-specified baseline factors. The estimates are from the analysis of covariance modeling log of C-peptide adjusting for age, gender, baseline value of C-peptide, the indicated categorized factor, treatment assignment, and treatment interaction terms. The homogeneity test of treatment effect was significant for DR3 allele status (p = 0.04). (B): The ratio (GAD-alum ×2 to alum ×3) of treatment effect on 1 year stimulated C-peptide AUC mean within categories of pre-specified baseline factors. The estimates are from the analysis of covariance modeling log of C-peptide adjusting for age, gender, baseline value of C-peptide, the indicated categorized factor, treatment assignment, and treatment interaction terms.