Author Contributions: Dr Malenka has full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the analysis.
Study concept and design: Malenka, Kaplan, Lucas, Skinner
Acquisition of data: Malenka, Lucas, Sharp, Skinner
Analysis and interpretation of data: Malenka, Kaplan, Lucas, Sharp, Skinner
Drafting of the manuscript: Malenka, Kaplan, Lucas, Skinner
Critical revision of the manuscript: Malenka, Kaplan, Lucas, Sharp, Skinner
Statistical analysis: Malenka, Lucas, Sharp, Skinner
Obtained funding: Lucas, Skinner
Administrative, technical, or material support: Malenka, Lucas, Sharp, Skinner
Study supervision: Malenka, Lucas, Skinner
Financial Disclosures: Dr Malenka reports receiving research funding from Guidant Endovascular Systems. Dr Kaplan reports receiving research funding from Abbott Vascular and is a Founder and Director of Tryton Medical Inc, a venture-backed “start up” company focused on the development of a stent technology to treat bifurcation lesions.
Funding/Support: This study was supported by grant P01 AG019783 from the National Institute on Aging and the Robert Wood Johnson Foundation.
Role of the Sponsors: The National Institute on Aging, the Robert Wood Johnson Foundation, and the Centers for Medicare & Medicaid Services had no role in the design and conduct of the study; the analysis and interpretation of data; or the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Lori Haffner, MS (Center for Outcomes Research and Evaluation, Maine Medical Center, Portland), for analytic assistance and editorial assistance in preparation of the manuscript. Ms Haffner received no compensation for her assistance apart from her employment at the institution where the study was conducted.