Accepted for Publication: November 29, 2013.
Published Online: February 10, 2014. doi:10.1001/jamainternmed.2013.14407.
Study concept and design: Safavi, Li, Dharmarajan, Venkatesh, Krumholz.
Acquisition of data: Krumholz.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Safavi, Li, Venkatesh, Lowe.
Critical revision of the manuscript for important intellectual content: Li, Dharmarajan, Venkatesh, Strait, Lin, Fazel, Nallamothu, Krumholz.
Statistical analysis: Safavi, Li, Strait, Lin, Lowe.
Obtained funding: Krumholz.
Administrative, technical, and material support: Krumholz.
Study supervision: Dharmarajan, Venkatesh, Krumholz.
Conflict of Interest Disclosures: Dr Krumholz is the recipient of a research grant from Medtronic, through Yale University, to develop methods of clinical trial data sharing and chairs a cardiac scientific advisory board for UnitedHealth.
Funding/Support: This work was supported by grant DF10-301 from the Patrick and Catherine Weldon Donaghue Medical Research Foundation in West Hartford, Connecticut; grant UL1 RR024139-06S1 from the National Center for Advancing Translational Sciences in Bethesda, Maryland; and grant U01 HL105270-04 (Center for Cardiovascular Outcomes Research at Yale University) from the National Heart, Lung, and Blood Institute in Bethesda, Maryland. At the time this study was conducted, Dr Dharmarajan was supported by grant HL007854 from the National Institutes of Health; he was also supported as a Centers of Excellence Scholar in Geriatric Medicine at Yale by the John A. Hartford Foundation and the American Federation for Aging Research.
Role of the Sponsors: The sponsors had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.