Accepted for Publication: May 21, 2013.
Published Online: November 27, 2013. doi:10.1001/jamasurg.2013.4244.
Study concept and design: Tillou, Kelley-Quon, Morley, Cryer, Min.
Acquisition of data: All authors.
Analysis and interpretation of data: Tillou, Kelley-Quon, Burruss, Cryer, Min.
Drafting of the manuscript: Tillou, Kelley-Quon, Morley, Cohen, Min.
Critical revision of the manuscript for important intellectual content: Tillou, Kelley-Quon, Burruss, Cryer, Min.
Statistical analysis: Cryer, Min.
Obtained funding: Tillou, Min.
Administrative, technical, or material support: Kelley-Quon, Burruss, Morley, Cohen, Min.
Study supervision: Tillou, Cryer, Min.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Tillou was supported by an American Geriatrics Society Jahnigen Award (2009-11). Drs Tillou and Min were supported by the K12 University of California, Los Angeles Mentored Clinical Scientist Development Program in Geriatrics (National Institute on Aging). Dr Min is supported by a Research Career Development Core grant from the University of Michigan Pepper Center (National Institute on Aging).
Role of the Sponsor: The funding agencies 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.
Previous Presentations: Interim results of this research were presented at the Annual Scientific Meeting of the Association for the Surgery of Trauma; September 24, 2010; Boston, Massachusetts; and full results were presented at the American Geriatrics Society Annual Scientific Meeting; May 3, 2013; Grapevine, Texas.
Additional Contributions: We acknowledge the technical assistance of Asmik Tantoushan and Chiao-Li Chan, MSW.