Abstract B110: Race/ethnicity, socioeconomic status, and early death among children enrolled in clinical trials for acute lymphoblastic leukemia
Authors: Lucht Sarah , Sample Jeannette M. , Spector Logan , Poynter Jenny N. , Turcotte Lucie , Marcotte Erin L. 
Published: December 2023

Abstract
Introduction: Prior work indicates that Hispanic and Black children diagnosed with leukemia may experience a higher risk of death in the period shortly after diagnosis, but no work has examined these disparities taking into account leukemia subtypes and the role socioeconomic status (SES) may play. We investigated reported race/ethnicity (RRE), health insurance status, neighborhood SES, and early death among pediatric acute lymphoblastic leukemia (ALL) patients enrolled on clinical trials. Methods: Using data from the Childhood Cancer Research Network as well as Children’s Oncology Group therapeutic trials, we estimated the associations between RRE (Non-Hispanic [NH] White, NH Black, NH Asian/Pacific Islander [PI], or Hispanic/Native American), health insurance status, neighborhood SES using the Yost Index, and death within 60 days of diagnosis using multivariable logistic regression. All analyses were adjusted for age at diagnosis, sex, and ALL subtype (Standard Risk B-Cell, High Risk B-Cell, Infant ALL, T-Cell). We also estimated associations among non-infant patients diagnosed with B-Cell ALL, additionally adjusting for standard or high-risk disease. All associations were estimated as odds ratios (OR) with 95% confidence intervals (CI). Results: Overall, we analyzed data from 8,634 pediatric ALL cases (7,559 B-Cell; 122 Infant ALL; 953 T-Cell) enrolled across 7 clinical trials (AALL0232, AALL0331, AALL0434, AALL0631, AALL0932, AALL1131, AALL1231). In total, there were 29 deaths within 60 days of diagnosis, including 22 among B-Cell, 4 among infant ALL, and 3 among T-Cell patients. In the full analysis, infant ALL subtype was very strongly associated with early death compared to Standard Risk B-Cell patients (OR: 37.8 [95% CI: 9.22, 137]). We also observed a suggestive association between NH Asian/PI RRE and higher odds of early death compared to NH Whites (OR: 3.10 [95% CI: 0.71, 9.63]), which remained after limiting the analysis to B-Cell patients (OR: 5.63 [95% CI: 1.24, 18.7]). No association was apparent between NH Black or Hispanic/Native American RRE and odds of early death. Neighborhood SES was not significantly associated with early death, though point estimates suggested a potential protective effect of increasing SES. Lack of health insurance was also suggestively associated with greater odds of early death (OR: 2.78 [95% CI: 0.60, 9.47]). Conclusion: Unlike prior work, we observed increased odds of death soon after diagnosis for NH Asian/PI children. Future work incorporating more detailed treatment and cytogenetic subtype information is needed to identify the factors contributing to this disparity.
Citation Format: Sarah Lucht, Jeannette M. Sample, Logan Spector, Jenny N. Poynter, Lucie Turcotte, Erin L. Marcotte. Race/ethnicity, socioeconomic status, and early death among children enrolled in clinical trials for acute lymphoblastic leukemia [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 B110.