Medical Xpress October 8, 2025
In 2014, a provision under the Patient Protection and Affordable Care Act (ACA) went into effect that allowed states to opt into expanding Medicaid eligibility to adults with incomes up to 138% of the federal poverty guidelines. Existing studies have linked Medicaid expansion to increased insurance coverage, access to cancer screening services, and improved two-year survival rates, but its impact on longer-term survival among individuals diagnosed with cancer remains unknown, according to Elizabeth Schafer, MPH, associate scientist at the American Cancer Society.
To answer their question, Schafer and her co-authors used a difference-in-differences (DD) study design that compared data from states during 2007–2008—a period prior to Medicaid expansion—with data from 2014–2015, when many states adopted the expansion. This design allowed...
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