Accepted for Publication: October 29, 2013.
Published Online: January 13, 2014. doi:10.1001/jamainternmed.2013.13328.
Study concept and design: O’Hare, Hotchkiss, Covinsky.
Acquisition of data: O’Hare, Batten.
Analysis and interpretation of data: O’Hare, Kurella Tamura, Larson, Hemmelgarn, Batten, Do, Covinsky.
Drafting of the manuscript: O’Hare, Batten.
Critical revision of the manuscript for important intellectual content: O’Hare, Hotchkiss, Kurella Tamura, Larson, Hemmelgarn, Do, Covinsky.
Statistical analysis: O’Hare, Batten, Do, Covinsky.
Obtained funding: O’Hare.
Administrative, technical, or material support: O’Hare, Kurella Tamura, Larson, Hemmelgarn.
Study supervision: O’Hare, Larson.
Conflict of Interest Disclosures: Dr Kurella Tamura reports having served on a scientific advisory board for Amgen. No other disclosures were reported.
Funding/Support: This study was supported by grant K24AG029812 (Dr Covinsky) and research funding (Drs O’Hare and Larson) from the National Institute on Aging, by VA Health Services Research and Development (Dr O’Hare), and by the Roy and Vi Baay Chair in Kidney Research (Dr Hemmelgarn).
Role of the Sponsor: The funding sources 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.
Additional Contributions: Whitney Showalter, BA, Department of Veterans Affairs Puget Sound Healthcare System, assisted with securing and maintaining institutional review board approvals and data use agreements for this study. Jeff Todd-Stenberg, BS, Department of Veterans Affairs Puget Sound Healthcare System, provided guidance on data acquisition and data use agreements for this project. Charles Maynard, PhD, assisted with acquisition of mortality data for this study. These contributors are employees of the Department of Veterans Affairs and did not receive any non-salary compensation for their work on this project.