IntroductionThis study evaluated the relationships between patient and cancer delivery factors with trust in oncology providers in a racial/ethnically diverse group of cancer patients. MethodsData were analyzed from a prospective cohort study of women with hormone receptor positive (HR+) breast cancer. A standardized survey collected validated measures of trust in providers, psychosocial factors, and cancer care delivery factors. Multivariable logistic regression models and race-stratified models were employed to calculate odds ratios and 95% confidence intervals associated with trust. ResultsOf the 567 participants, 28% identified as Black and the rest were White. Compared to White women Black women reported lower trust in providers. Four domains of cancer care delivery were significantly associated with patients’ higher trust in their providers: general satisfaction with care (p<0.0001), technical quality of the provider (p<0.001), interpersonal manner of the provider (p=0.0008) and provider communication (p=0.0010). Race-stratified models revealed two significant cancer care delivery domains for both groups (i.e., general satisfaction and interpersonal) and two care domains (technical quality and communication) that were only significant among White women. ConclusionEfforts are needed to nurture trusting relationships between Black women and their oncology providers. Factors related to the organization and delivery of cancer care are modifiable targets for interventions as these were robust predictors of patient trust regardless of a woman's self-reported race. Investments in strategies that strengthen the structure and organization of care towards a structures of trust worthiness may better support providers and patients and ultimately reduce cancer care disparities. Micro abstractThe relationship between patient trust and cancer care delivery factors was examined among a diverse sample of Black and White breast cancer survivors. Results showed that Black women reported lower trust relative to White participants. Several aspects of care delivery (e.g., interpersonal manner) were shown to impact trust. Organizational aspects of cancer care can serve as modifiable intervention targets.