Accepted for Publication: March 27, 2015.
Published Online: May 26, 2015. doi:10.1001/jamainternmed.2015.1849.
Study concept and design: Ornstein, Szanton.
Acquisition, analysis, or interpretation of data: Ornstein, Leff, Roberts, Szanton.
Drafting of the manuscript: Ornstein.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Ornstein, Roberts, Szanton.
Conflict of Interest Disclosures: None reported.
Funding/Support: The National Health and Aging Trends Study is sponsored by grant NIA U01AG32947 from the National Institute on Aging. Dr Ornstein was supported by grant K01AG047923 from the National Institute on Aging and by the National Palliative Care Research Center. Dr Kelley was supported by grant 1K23AG040774-01A1 from the National Institute on Aging and by the American Federation for Aging Research. Dr Szanton was supported by program 69351 from the Robert Wood Johnson Foundation Nurse Faculty Scholars.
Role of the Funder/Sponsor: The study sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Correction: This article was corrected on July 9, 2015, to fix an error in the Figure and text.