LAUSR

Background: Despite Advance Care Planning recommendations for patients with cancer, many lack Advance Directives (ADs). AD disparities persist among Black, Indigenous, or People of Color (BIPOC) patients. Based on a hypothesized correlation, we examined the association between patient-perceived cancer incurability and AD completion. Methods: This cross-sectional study obtained self-reported AD completion and incurability perception from routine care surveys. AD completion by incurability perception was estimated using modified Poisson regression. Subgroup analyses examined patients who were BIPOC, White, and had solid organ malignancies. Results: Our sample (N = 1209) was predominantly female (70%), White (73%) with early-stage disease (60%), and solid organ malignancies (82%). AD completion was 42%, and 40% of patients reported their cancer incurable. Patient-perceived incurability was not associated with increased AD completion (likelihood ratio 0.94, 95% confidence interval 0.78-1.13) in overall or subgroup analyses. Conclusion: Patient-perceived cancer incurability was not associated with AD completion, even accounting for race/ethnicity and cancer type.