Accepted for Publication: May 13, 2013.
Published Online: July 8, 2013. doi:10.1001/jamainternmed.2013.8185.
Study concept and design: Sheehy, Graf, Jacobs.
Acquisition of data: Sheehy, Heidke.
Analysis and interpretation of data: Sheehy, Graf, Gangireddy, Hoffman, Ehlenbach, Fields, Liegel, Jacobs.
Drafting of the manuscript: Sheehy, Graf.
Critical revision of the manuscript for important intellectual content: Gangireddy, Hoffman, Ehlenbach, Heidke, Fields, Liegel, Jacobs.
Obtained funding: Sheehy.
Administrative, technical, and material support: Gangireddy, Hoffman, Ehlenbach, Heidke, Fields, Liegel.
Study supervision: Sheehy, Graf.
Conflict of Interest Disclosures: Dr Graf reports receiving royalties from Smith & Nephew for patents he has assigned to them involving orthopedic implants used in arthroscopic surgery. The remaining authors have no relevant financial disclosures or conflicts to report.
Funding/Support: This study was supported by the University of Wisconsin Department of Medicine (Dr Sheehy). Dr Jacobs was supported by grant R01 AG033172-01 from the National Institute on Aging.
Role of the Sponsor: The sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.
Previous Presentation: Portions of data were presented at the Eighth Annual Midwestern Hospital Medicine Conference; October 11, 2012; Chicago, Illinois.
Additional Contributions: Daniel S. Dexter, BA, Project Manager at UWHC Business Planning and Analysis, assisted with the data set, and Andrew T. LaRocque, BBA, Analyst at the University of Wisconsin School of Medicine and Public Health, Division of Hospital Medicine, assisted with data presentation. Neither received additional compensation for their work on this study.