Survival differences for MM patients by CH status and race and ethnicity. Stratified OS curves with multivariable HRs and 95% CIs for the association of CH status with risk of mortality are provided for non-Hispanic Black (Ai, Bi), Hispanic (Aii, Bii), and non-Hispanic White (Aiii, Biii) MM patients. Multivariable models are adjusted for age at MM diagnosis, sex, ISS at MM diagnosis, HCT, and frontline treatment regimen. The HR for OS among Hispanic MM patients could not be calculated because no deaths occurred in the patients with CH (n = 5).