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Obamacare improved key health-care measurements for millions of Americans, reversing a troubling trend, a new study strongly suggests.
The study found marked gains in the number of people with insurance—as other research has repeatedly confirmed—as well as improved access to doctors and medications, affordable health care and good health status after implementation of the Affordable Care Act.
But the research published Tuesday in the Journal of the American Medical Association also noted that the the gains in health coverage and access to care for low-income adults were particularly striking in states that expanded their Medicaid programs under the ACA to include more poor people.
The improvements nationwide came after all six measures used in the study "showed worsening trends in the 2012-13 period, particularly between March 2013 and September 2013," according to the study, which looked at the experiences of about 500,000 adults age 18 to 64.
All but one of those measures—days limited by poor health—improved significantly after Obamacare plans went on sale on government-run exchanges in October 2013, according to the study, whose authors are from Harvard's T.H. Chan School of Public Health, Brigham and Women's Hospital in Boston, the U.S. Health and Human Services Department and the Commonwealth Fund.
The number of people who lacked health insurance fell by 7.9 percentage points, and there was a 3.5 percentage-point drop in the number of people who lacked a personal physician, the study found.
The number of people who reported being unable to afford care fell by 5.5 percentage points. People who said they were just in fair or poor health dropped by 3.4 percentage points after the ACA took effect, the study found.
There was also 2.4 percentage-point reduction in the number of people who lacked easy access to medicine. For the category of days limited by poor health, the downward trend of people reporting that measurement stopped getting worse after the ACA went into effect, but it did not get significantly better as did the other measurements, the study found.
And "we found that the largest improvements in access to coverage occurred among racial and ethnic minorities," said Dr. Benjamin Sommers of Harvard, lead author of the JAMA report.
While whites saw their uninsured rates drop by 6.1 percentage points, there was an 11.9 percentage point decrease in the number of uninsured Latinos. The number of non-Latino blacks without health coverage decreased by 10.8 percentage points after the ACA went into effect.
Those results "suggest that the ACA may be associated with reductions in long-term disparities in access to care, one of the goals of the ACA," the report said.
The authors noted that they could not determine whether the changes "are directly related to the ACA's coverage expansions," particularly given the fact that the economic recovery that was going on at the same time may have also played an role. But, they added that the analysis adjusted for several potential economic factors, including income, individual employment and state unemployment rates.
And they also said the analysis that looked at the differences in Medicaid expansion states "represents a stronger research design because it included a control group" of states that did not expand Medicaid.
The study comes a month after a major U.S. Supreme Court decision ensured that federal subsidies that help most Obamacare customers pay for their health insurance plans are available in every state, and not just in the District of Columbia and the 13 states that are operating their own marketplaces. It also comes slightly more than three months before the start of Obamacare's third open enrollment season on Nov. 1.
In the most recent open enrollment period, ended in February, about 10.2 million were enrolled in private health plans sold on Obamacare exchanges.
Another 12.2 million extra people have been covered by Medicaid and the Children's Health Program since the ACA was implemented.
As of this month, 29 states and the District of Columbia have expanded Medicaid to cover, typically at no charge to enrollees, nearly all adults whose household income is less than 138 percent of the federal poverty level, or $16,242 for a single person in most states. For the first three years of expansion, the federal government is footing 100 percent of the bill for the newly eligible in such states, and then has committed to funding no less than 90 percent of their costs in perpetuity, with states picking up the balance of costs for the newly eligible.
States that have expanded Medicaid have seen bigger overall reductions in the number of low-income people who lack insurance and personal physicians, and who have difficulty accessing medicine than did the states that did not expand their Medicaid programs, which are jointly run with the federal government, the study found.
States that expanded Medicaid saw the uninsured rate among low-income adults drop by 5.2 percentage points more than non-expansion states, according to the study. Expansion states had drop in the number of such adults who had no personal doctor that was 1.8 percentage points better than non-expansion state, and 2.2 percentage points greater than non-expansion states when measuring the number of low-income earners who had no easy access to medicine.
"As states continue to debate whether to expand Medicaid under the ACA, these results add to the growing body of research indicating that such expansions are associated with significant benefits for low-income populations," the authors of the study wrote.
However, the authors added, "in contrast to prior Medicaid studies, we did not find statistically significant changes in self-reported health."
The ACA, as of 2014, required that most Americans have some sort of health coverage or pay a fine.
To expand coverage, the law mandated that adult children be allowed to stay on their parents' health plan until age 26, authorized the creation of health insurance marketplaces to offer subsidized plans, and authorized states to expand their Medicaid programs to cover, usually at no direct cost to enrollees, nearly all people who earn less than 138 percent of the federal poverty level.