Published Online: March 29, 2014. doi:10.1001/jama.2014.2531.
Study concept and design: Navar-Boggan, Pencina, Sniderman.
Acquisition, analysis, or interpretation of data: Navar-Boggan, Pencina, Williams, Peterson.
Drafting of the manuscript: Navar-Boggan, Peterson.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Navar-Boggan, Pencina, Williams, Peterson.
Obtained funding: Sniderman.
Administrative, technical, or material support: Navar-Boggan.
Study supervision: Peterson.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Peterson reported receiving research grant funding from Janssen and Eli Lilly, as well as compensation for consulting services to Janssen and Boehringer Ingelheim. No other disclosures were reported.
Funding/Support: This research was supported in part by Duke Clinical Research Institute’s research funds and unrestricted grants from M. Jean de Granpre and Louis and Sylvia Vogel.
Role of the Sponsors: The funding source has no role in 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: Dr Peterson, an associate editor for JAMA, was not involved in the editorial review of or decision to publish this article.
Correction: This article was corrected for a typographical error in Table 1 on July 29, 2014.