Published Online: January 28, 2013. 10.1001/jamainternmed.2013.1883. Corrected March 11, 2013.
Author Contributions:Study concept and design: Dodson, Fried, and Lampert. Acquisition of data: Dodson. Analysis and interpretation of data: Dodson, Fried, Van Ness, Goldstein, and Lampert. Drafting of the manuscript: Dodson. Critical revision of the manuscript for important intellectual content: Fried, Van Ness, Goldstein, and Lampert. Statistical analysis: Dodson and Van Ness. Obtained funding: Fried. Study supervision: Fried, Lampert.
Conflict of Interest Disclosures: Dr Lampert receives significant research grants from Medtronic, Boston Scientific, and St Jude and a modest honorarium from Medtronic.
Funding/Support: Support for this study was provided by a training grant in Geriatric Clinical Epidemiology from the National Institute on Aging (T32 AG019134) (Dr Dodson) and a mid-career mentorship award from the National Institute of Aging (K24AG028443) (Dr Fried). This work was supported in part by a grant from the Claude D. Pepper Older Americans Independence Center at Yale University School of Medicine (P30AG021342 National Institutes of Health/National Institute of Aging).