In states that expanded Medicaid under the Affordable Care Act, the rate of low-income adults lacking health insurance dropped 7.5 percentage points more than the same measure in non-expansion states by 2015, according to an AHRQ study in the May issue of Health Affairs. Researchers analyzed federal survey results for more than 97,000 low-income adults between the ages of 19 and 64 who either lived in states that expanded Medicaid in 2014 or in states that did not expand Medicaid in either 2014 or 2015. While low-income adults in all states gained health insurance between 2013 and 2015, the rate of uninsurance fell by 18.2 percentage points in expansion states and 10.7 percentage points in non-expansion states. Survey respondents in expansion states were also significantly more likely to report that their health insurance coverage was better in both 2014 and 2015, compared to respondents in non-expansion states. Access the abstract.