Accepted for Publication: August 10, 2014.
Published Online: November 24, 2014. doi:10.1001/jamainternmed.2014.5420.
Study concept and design: Sanghavi, Jena, Zaslavsky.
Acquisition, analysis, or interpretation of data: Sanghavi, Jena, Newhouse.
Drafting of the manuscript: Sanghavi, Jena, Zaslavsky.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: All authors.
Obtained funding: Sanghavi.
Study supervision: Jena, Newhouse.
Conflict of Interest Disclosures: Dr Newhouse reported being a director of and holding equity in Aetna. No other disclosures were reported.
Funding/Support: Ms Sanghavi was supported by a National Science Foundation Graduate Research Fellowship and a Health Services Research Dissertation Award (R36) from the Agency for Healthcare Research and Quality. Dr Jena was supported by Early Independence Award 1DP5OD017897-01 from the National Institutes of Health.
Role of the Funder/Sponsor: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.