API, Asian or Pacific Islander; NHB, non-Hispanic black; NHW, non-Hispanic white. (A-B) Boxplots of adjusted mutation rate residuals (tumor mutational burden, TMB) across racial/ethnic groups for (A) early-onset and (B) late-onset non-hypermutated CRC. The residual of adjusted mutation rates and P-values were derived from models adjusted for sex, tumor site and histology, sequencing assay, and sample type.
(C-E) Mutation frequencies between genes differentially expressed between early-onset vs late-onset non-hypermutated CRC cases that reached statistical significance for (C) API, (D) NHB, and (E) NHW patients.