Abstract 4791: Characterizing interventions to reduce disparities in lung-cancer screening uptake by state Medicaid expansion status: A scoping review
Authors: Reid Miranda J. , Washington Caretia , Wheeler Meghann , Adkins Lauren , Braithwaite Dejana , Salloum Ramzi 
Published: March 2024

Abstract
Background: Lung cancer is the leading cause of cancer-related deaths in the United States, and yet, lung cancer screening rates remain persistently low. Many interventions are being developed to address the low rates of lung cancer screening (LCS), including interventions that address the additional barriers faced by historically marginalized racial and ethnic populations as well as low-income and rural populations. However, the impact of Medicaid expansion on the types of interventions developed in non-expansion states and the efficacy of those interventions is not well understood.
Methods: A research librarian conducted searches in MEDLINE via PubMed, Web of Science, and Embase. Results were screened and evaluated for eligibility by three reviewers in Covidence. Data was extracted from included studies after full-text review and analyzed using both a thematic analysis and a descriptive numerical summary of studies. The chosen framework was based on scoping review guidelines by Levac et al. and Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for scoping reviews (PRISMA-ScR).
Results: Of 4696 studies found through the initial search, 53 met inclusion criteria. This includes 34 studies in Medicaid expansion states (M) and 17 studies in non-Medicaid expansion states (NM). Two additional studies compared interventions implemented in a Medicaid expansion state to a similar intervention implemented in a non-expansion state. Studies in both groups were primarily focused on addressing disparities by race and ethnicity (M=74%; NM=65%), with fewer studies focusing on rurality (M=9%; NM=12%), income (M=9%; NM=0%), or multiple disparities (M=9%; NM=24%). In non-expansion states, the most common interventions were patient navigation (29%) and community outreach (24%). While in Medicaid expansion states, the most common interventions were EHR algorithms (24%) and decision aids (21%). The intervention setting for both Medicaid expansion and non-expansion states were most commonly in a hospital/health system (M=53%; NM=47%) or community setting (M=24%; NM=47%). Interventions in both groups typically showed some improvement in uptake of LCS, though the degree of impact was variable between studies.
Conclusion: Due to continued barriers to access posed by inadequate insurance coverage, there is a critical need for interventions to reduce disparities in lung cancer mortality in states that have not expanded Medicaid. Interventions focused on patient navigation and community outreach have been effective in multiple settings in these states and could fill that gap.
Citation Format: Miranda J. Reid, Caretia Washington, Meghann Wheeler, Lauren Adkins, Dejana Braithwaite, Ramzi Salloum. Characterizing interventions to reduce disparities in lung-cancer screening uptake by state Medicaid expansion status: A scoping review [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 4791.