Accepted for Publication: June 9, 2014.
Published Online: September 8, 2014. doi:10.1001/jamainternmed.2014.4103.
Study concept and design: Tjia, Briesacher, Liu, Mitchell.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Tjia, Liu, Mitchell.
Critical revision of the manuscript for important intellectual content: Tjia, Briesacher, Peterson, Andrade, Mitchell.
Statistical analysis: Tjia, Briesacher, Peterson, Liu.
Obtained funding: Tjia, Liu.
Administrative, technical, or material support: Briesacher.
Study supervision: Andrade, Mitchell.
Conflict of Interest Disclosures: Dr Briesacher reports receiving an unrestricted research grant from Daiichi Snakyo, Inc, for an unrelated study.
Funding/Support: This study was supported by grant R21 HS19579 from the Agency for Healthcare Research and Quality (Dr Tjia); Research Scientist Award K01AG031836 from the National Institute on Aging (Dr Briesacher), and grant K24AG033640 from the National Institute on Aging (Dr Mitchell).
Role of the Funder/Sponsor: The funding organizations 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: Holly Holmes, MD, Department of Medicine, Division of General Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, and Joseph Shega, MD, Department of Medicine, Division of Geriatrics and Palliative Medicine, University of Chicago, Illinois, critically reviewed earlier drafts of the manuscript. Neither received financial compensation for this study.
Correction: This article was corrected on October 2, 2014, for an error in the text.