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  • Title: Association of the Affordable Care Act Medicaid Expansion with Trauma Outcomes and Access to Rehabilitation among Young Adults: Findings Overall, by Race and Ethnicity, and Community Income Level.
    Author: Metzger GA, Asti L, Quinn JP, Chisolm DJ, Xiang H, Deans KJ, Cooper JN.
    Journal: J Am Coll Surg; 2021 Dec; 233(6):776-793.e16. PubMed ID: 34656739.
    Abstract:
    BACKGROUND: Low-income young adults disproportionately experience traumatic injury and poor trauma outcomes. This study aimed to evaluate the effects of the Affordable Care Act's Medicaid expansion, in its first 4 years, on trauma care and outcomes in young adults, overall and by race, ethnicity, and ZIP code-level median income. STUDY DESIGN: Statewide hospital discharge data from 5 states that did and 5 states that did not implement Medicaid expansion were used to perform difference-in-difference (DD) analyses. Changes in insurance coverage and outcomes from before (2011-2013) to after (2014-2017) Medicaid expansion and open enrollment were examined in trauma patients aged 19 to 44 years. RESULTS: Medicaid expansion was associated with a decrease in the percentage of uninsured patients (DD -16.5 percentage points; 95% CI, -17.1 to -15.9 percentage points). This decrease was larger among Black patients but smaller among Hispanic patients than White patients. It was also larger among patients from lower-income ZIP codes (p < 0.05 for all). Medicaid expansion was associated with an increase in discharge to inpatient rehabilitation (DD 0.6 percentage points; 95% CI, 0.2 to 0.9 percentage points). This increase was larger among patients from the lowest-compared with highest-income ZIP codes (p < 0.05). Medicaid expansion was not associated with changes in in-hospital mortality or readmission or return ED visit rates overall, but was associated with decreased in-hospital mortality among Black patients (DD -0.4 percentage points; 95% CI, -0.8 to -0.1 percentage points). CONCLUSIONS: The Affordable Care Act Medicaid expansion, in its first 4 years, increased insurance coverage and access to rehabilitation among young adult trauma patients. It also reduced the socioeconomic disparity in inpatient rehabilitation access and the disparity in in-hospital mortality between Black and White patients.
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