Accepted for Publication: August 26, 2012.
Published Online: December 10, 2012. doi:10.1001/jamainternmed.2013.1221
Author Contributions: Dr Spring had full access to all the study data and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Spring, Janke, Kozak, Hedeker, and Epstein. Acquisition of data: Duncan, Demott, and Pictor. Analysis and interpretation of data: Hedeker, Spring, Siddique, McFadden, and Duncan. Drafting of the manuscript: Spring, Duncan, Janke, Kozak, and Hedeker. Critical revision of the manuscript for intellectual content: Janke, Kozak, Hedeker, Pellegrini, and Buscemi. Obtained funding: Spring. Administrative, technical, or material support: Duncan, McFadden, Demott, and Pictor. Study supervision: Spring, Janke, and Kozak.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by a VA Merit Review F442291 Rehabilitation Research and Development–funded study at Hines VA Medical Center, Hines, Illinois, to Dr Spring. The development of the PDA tool used in this study was funded by grant HL075451 from the National Heart, Lung, and Blood Institute.