Published Online: September 16, 2013. doi:10.1001/jamainternmed.2013.10059.
Study concept and design: Nyweide, Anthony, Bynum, Weeks, Casalino, Fisher.
Acquisition of data: Nyweide.
Analysis and interpretation of data: Nyweide, Anthony, Bynum, Strawderman, Weeks, Casalino.
Drafting of the manuscript: Nyweide, Anthony, Bynum, Strawderman, Weeks.
Critical revision of the manuscript for important intellectual content: Nyweide, Anthony, Bynum, Strawderman, Weeks, Casalino, Fisher.
Statistical analysis: Nyweide, Strawderman.
Obtained funding: Bynum.
Administrative, technical, or material support: Weeks.
Study supervision: Anthony, Bynum, Weeks, Fisher.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported in part by the National Institute on Aging (grant PO1 AG19783).
Role of the Sponsor: The National Institute on Aging 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.
Disclaimer: This study was started prior to Dr Nyweide’s employment at the Centers for Medicare & Medicaid Services (CMS) and does not reflect CMS policy.
Previous Presentation: A version of this study was presented at the AcademyHealth Annual Research Meeting; June 27, 2010; Boston, Massachusetts.