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  • Title: Association of Medicaid Expansion with Reduction in Racial Disparities in the Timely Delivery of Upfront Surgical Care for Patients With Early-Stage Breast Cancer.
    Author: Tamirisa N, Lei X, Malinowski C, Li M, Bedrosian I, Chavez-MacGregor M.
    Journal: Ann Surg; 2024 Jul 01; 280(1):136-143. PubMed ID: 38099455.
    Abstract:
    OBJECTIVE: We evaluated the association between Medicaid expansion and time to surgery among patients with early-stage breast cancer (BC). BACKGROUND: Delays in surgery are associated with adverse outcomes. It is known that underrepresented minorities are more likely to experience treatment delays. Understanding the impact of Medicaid expansion on reducing racial and ethnic disparities in health care delivery is critical. METHODS: This was a population-based study including women ages 40 to 64 with stage I-II BC who underwent upfront surgery identified in the National Cancer Database (2010-2017) residing in states that expanded Medicaid on January 1, 2014. Difference-in-difference analysis compared rates of delayed surgery (>90 d from pathological diagnosis) according to time period (preexpansion [2010-2013] and postexpansion [2014-2017]) and race/ethnicity (White vs. racial and ethnic minority), stratified by insurance type (private vs. Medicaid/uninsured). Secondary analyses included logistic and Cox proportional hazards (PH) regression. All analyses were conducted among a cohort of patients in the nonexpansion states as a falsification analysis. Finally, a triple-differences approach compared preexpansion with the postexpansion trend between expansion and nonexpansion states. RESULTS: Among Medicaid expansion states, 104,569 patients were included (50,048 preexpansion and 54,521 postexpansion). In the Medicaid/uninsured subgroup, Medicaid expansion was associated with a -1.8% point (95% CI: -3.5% to -0.1, P =0.04) reduction of racial disparity in delayed surgery. Cox regression models demonstrated similar findings (adjusted difference-in-difference hazard ratio 1.12 [95% CI: 1.05 to 1.21]). The falsification analysis showed a significant racial disparity reduction among expansion states but not among nonexpansion states, resulting in a triple-difference estimate of -2.5% points (95% CI: -4.9% to -0.1%, P =0.04) in this subgroup. CONCLUSIONS: As continued efforts are being made to increase access to health care, our study demonstrates a positive association between Medicaid expansion and a reduction in the delivery of upfront surgical care, reducing racial disparities among patients with early-stage BC.
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