They projected that 423,000 fewer diabetics would receive medication to treat their disease. If opt-out states had expanded Medicaid, 659,000 women who are in need of mammograms and 3.1 million women who should receive regular pap smears would have become insured, the study found.
"Low-income adults in states that have opted out of Medicaid expansion will forego gains in access to care, financial well-being, physical and mental health, and longevity that would be expected with expanded Medicaid coverage," the authors wrote.
In terms of health coverage, expanding states will experience a 48.9 percent decrease in their uninsured population compared to a 18.1 percent decrease in non-expanding states. Eight million people will remain uninsured because their states didn't expand Medicaid, according to the study.
According to the Kaiser Family Foundation, 25 states plus the District of Columbia are expanding Medicaid under Obamacare, and 23 states are not. Two states, Indiana and Pennsylvania, are seeking to move forward with expansion in 2014, but their proposals have not been finalized. Those states were considered non-expanding states in the Health Affairs study.
A full methodology is available here.