Author Contributions: Dr Lee had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Cruz, Covinsky, Lee.
Acquisition of data: Stijacic-Cenzer, Lee.
Analysis and interpretation of data: Cruz, Covinsky, Widera, Stijacic-Cenzer, Lee.
Drafting of the manuscript: Cruz, Stijacic-Cenzer, Lee.
Critical revision of the manuscript for important intellectual content: Covinsky, Widera, Lee.
Statistical analysis: Stijacic-Cenzer, Lee.
Obtained funding: Covinsky, Lee.
Administrative, technical, or material support: Cruz, Covinsky, Lee.
Study supervision: Widera, Lee.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: Dr Lee's effort was supported by the American Federation for Aging Research and the National Institute on Aging through the Beeson Career Development Award K23AG040779. Dr Covinsky's effort was supported by grant K24AG029812 from the National Institute on Aging.
Role of the Sponsor: The funders had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Previous Presentation: This work was presented as an oral abstract at the 2011 Society for General Internal Medicine National Meeting, Orlando, Florida.