Abstract B079: Neighborhood social vulnerability and disparities in time to kidney cancer surgical treatment in Arizona

Abstract

Abstract Background: Hispanics and American Indians (AI) have a higher kidney cancer incidence and mortality in Arizona. This study assessed 1) whether racial and ethnic minority patients and patients from neighborhoods with high social vulnerability, measured using the social vulnerability Index (SVI), experience a longer time (in days) to surgical treatment for kidney cancer after clinical diagnosis, and 2) whether time to surgery, race and ethnicity, and neighborhood social vulnerability are associated with adverse pathology (upstaging to pT3), progression free survival (PFS), and overall survival (OS) in Arizona.   Methods: Arizona Cancer Registry (2009-2018) data for kidney and renal pelvis cases were obtained. Logistic regression models were used to assess if SVI (<25, 25-49, 50-74, and ≥75 percentile) and race and ethnicity were associated with a longer time to surgical (>median time to surgery) and upstaging. Cox-regression hazard models were used to assess if time to surgery and SVI were associated with PFS and OS. Separate analyses were performed for each clinical stage (cT1a, cT1b, cT2, and cT3).   Results: A total of 4,592 kidney and renal pelvis cases (16.6% Hispanics and 4.8% AI) were included. Hispanic and AI patients with T1 tumors had a longer time to surgery than NHW patients (median time of 56, 55, and 45 days respectively). In unadjusted models, Hispanic ethnicity was associated with a longer time to surgery for cT1a (OR 1.48, 95% CI:1.05-2.08) and cT1b (OR 1.87, 95% CI:1.14-3.07). Hispanic and AI patients were also more likely to live in neighborhoods with high SVI than NHW patients. Living in neighborhoods with high (≥75) versus low (<25) overall SVI increased odds of a longer time to surgical for cT1a (OR 1.54, 95% CI:1.02-2.31) and cT2 (OR 2.32, 95% CI:1.13-4.73) in adjusted models. In these adjusted models, Hispanic ethnicity was no longer significantly associated with time to surgery. Among cT1a patients, a longer time to surgery increased odds of upstaging to pT3 (OR 1.95, 95% CI: 0.99-3.84) and risk of mortality. A longer time to surgery was associated with PFS with HR 1.52 (95% CI: 1.17- 1.99) and OS with HR 1.63 (95% CI:1.26-2.11) even after adjusting for SVI. Living in neighborhoods with high concentrations of racial and ethnic minorities increased odds of upstaging (OR 2.88, 95% CI: 0.99-8.37) in cT1a and was associated with PFS in cT3 (HR 2.45, 95% CI: 1.01-4.77). Compared to patients living in neighborhoods with SVI<25, patients with cT1a and cT2 tumor living in neighborhoods with SVI≥75 had about a 60% increased risk of mortality (OS HR 1.57, 95% CI: 1.01-2.45 for cT1b and HR 1.66, 95%CI:1.07-2.57 for cT2).   Conclusion: These findings demonstrate that high neighborhood social vulnerability is associated with increased time to surgery and risk of progression and mortality.   Impact: Neighborhood-level social vulnerability partly accounts for kidney cancer disparities in Arizona. Interventions need to focus on neighborhoods with high social vulnerability to improve care coordination for kidney cancer. Citation Format: Celina I. Valencia, Patrick Wightman, Kristin Morrill, Chiu-Hsieh Hsu, Hina Arif-Tiwari, Eric Kauffman, Francine C. Gachupin, Juan Chipollini, Benjamin R. Lee, Ken Batai. Neighborhood social vulnerability and disparities in time to kidney cancer surgical treatment in Arizona [abstract]. In: Proceedings of the 16th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2023 Sep 29-Oct 2;Orlando, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2023;32(12 Suppl):Abstract nr B079.