Of the people who purchased health insurance through a public exchange in 2014, 9% more federal exchange participants re-enrolled compared to the state-run marketplaces.
Nearly 8 in 10 (78%) of those in states using the federal marketplace re-enrolled for 2015. That compares with just under 7 in 10 (69%) in states with state-run marketplaces, according to research by health consultancy Avalere Health.