• J Gen Intern Med · Oct 2024

    Neighborhood Socioeconomic Disadvantage and Acute Care Utilization in Washington State Medicaid: A Retrospective Cohort Study.

    • Anna M Morenz, Edwin S Wong, Lingmei Zhou, Christopher P Chen, Judy Zerzan-Thul, and Joshua M Liao.
    • Department of Medicine, University of Arizona, 1501 N. Campbell Ave, Tucson, AZ, 85724, USA. anna.morenz@gmail.com.
    • J Gen Intern Med. 2024 Oct 11.

    BackgroundNeighborhood disadvantage has been associated with potentially preventable acute care utilization among Medicare beneficiaries, but this association has not been studied in a Medicaid population, which is important for informing more equitable care and policies for this population.ObjectiveTo describe the association between Area Deprivation Index (ADI) and acute care utilization (including potentially preventable utilization) among Medicaid beneficiaries in Washington State.DesignRetrospective cohort study of 100% Medicaid claims. Mixed effects logistic regression was applied to estimate the association between state-level ADI decile and acute care utilization, adjusting for age, sex, self-identified race and ethnicity, Charlson Comorbidity Index, primary spoken language, individual Federal Poverty Level, homelessness, and rurality. Standard errors were clustered at the Census block group level.Participants1.5 million unique adult Medicaid beneficiaries enrolled for at least 11 months of a calendar year during the period 2017-2021.Main MeasuresBinary measures denoting receipt of ED visits, low-acuity ED visits, hospitalizations in a calendar year.Key ResultsIncreasing levels of neighborhood socioeconomic disadvantage (by ADI decile) were associated with greater odds of any ED visits (adjusted odds ratio (aOR) 1.07, 95% confidence interval (CI) 1.06-1.07), low-acuity ED visits (aOR 1.08, CI 1.08-1.08), and any hospitalizations (aOR 1.02, CI 1.02-1.02).ConclusionsAmong Medicaid beneficiaries, greater neighborhood socioeconomic disadvantage was associated with increased acute care utilization, including potentially preventable utilization. These findings signal potential barriers to outpatient care access that could be amenable to future intervention by health systems and payers.© 2024. The Author(s), under exclusive licence to Society of General Internal Medicine.

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