Venn diagram of numbers of patients with GADA, IA-2A, or ZnT8A; n = 598 of 6,156 (9.8%). Of the autoantibody-positive samples, GADA was identified in 90% of the samples when an autoantibody was detected, with IA-2A and ZnT8A accounting for the remaining 10% of the autoantibodies detected. GADA, n = 541 (8.8%); IA-2A, n = 144 (2.3%); and ZnT8A, n = 110 (1.8%).