ArticleCancer causes & control : CCC2025
Association of Medicaid expansion with colon cancer care: treatment patterns and survival in non-metastatic cases from state registry-claims data.
Article in Cancer causes & control : CCC, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeDespite growing research on Medicaid expansion's impact on cancer outcomes, there remains a critical need for a more nuanced understanding of how expansion affects cancer care and survival. This study assesses whether Medicaid expansion was associated with improved receipt of standard treatment, timely treatment initiation, and overall survival among colon cancer patients, while examining the specific factors influencing these outcomes.
methodsUsing Ohio's state cancer registry linked with Medicaid records, we analyzed 688 Medicaid-enrolled patients with non-metastatic colon cancer diagnosed between May 2011 and December 2017. We employed multivariable Poisson and Cox proportional hazard regression analyses to evaluate the impact of Medicaid expansion on treatment and survival outcomes, controlling for individual- and area-level factors.
resultsWe observed no significant changes in the likelihood of receipt of standard treatment or timely treatment initiation post-expansion vs. pre-expansion, and no significant differences in these outcomes by Medicaid eligibility criteria post-expansion. However, we observed significantly improved survival (hazard ratio, HR 0.49 [0.28, 0.88]) among patients who became newly eligible for Medicaid under the ACA vs. pre-expansion. Patients enrolled emergently (shortly after/upon diagnosis) were more likely to receive standard treatment (risk ratio, RR 1.14 [1.02, 1.27]).
conclusionsOur findings provide nuanced insights into Medicaid expansion's impact on colon cancer care, showing that while expansion did not affect treatment measures, it improved survival among newly eligible patients. Higher standard treatment likelihood among emergently enrolled patients suggests complex post-expansion care dynamics. Further research should investigate mechanisms underlying improved survival and develop interventions to enhance treatment quality alongside observed survival benefits.
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