(A) Schematic illustrating the human islet phenotyping and genotyping pipelines utilized by the HIPP and HIGI. The HIPP performs analysis of islet morphology, purity, viability, histology, and function; the remaining sample is archived in a biorepository for additional analyses. The HIGI receives a non-islet tissue sample and isolates DNA to sequence for genetic ancestry prediction and calculation of genetic risk scores for type 1 and type 2 diabetes. (B) Descriptive statistics of donor demographics by sex and reported race or ethnicity (n = 299). Values are reported as mean ± standard deviation, followed by the range. (C) Descriptive statistics of donor demographics by sex and primary predicted ancestry (n = 268). Values are reported as mean ± standard deviation, followed by the range. **p < 0.01 vs. male donors; ***p < 0.001 vs. male donors.