Consumers are reenrolling for health coverage at a healthy clip, even in state-run exchanges where they have to actively re-up for coverage.

That's what a study of six state-run exchanges found, when enrollment data from 2014 and 2015 were compared. The study was conducted by researchers at Georgetown University with funding from the Robert Wood Johnson Foundation. Researchers gathered information from enrollment data and live interviews to draw their conclusions, which overwhelmingly validated these states' strategies for growing their exchanges.

The researchers noted states that run their own exchanges are under pressure to both add those without coverage to the ranks of the insured and to get those already covered to renew that coverage. Failure to pay careful attention to both groups could ultimately cause the exchanges to fail, they said. So first-year renewal rates offer a compelling window into what works and what doesn't.