Author Contributions: Dr Popescu had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Popescu, Vaughan-Sarrazin, Rosenthal.
Acquisition of data: Vaughan-Sarrazin, Rosenthal.
Analysis and interpretation of data: Popescu, Vaughan-Sarrazin, Rosenthal.
Drafting of the manuscript: Popescu, Rosenthal.
Critical revision of the manuscript for important intellectual content: Popescu, Vaughan-Sarrazin, Rosenthal.
Statistical analysis: Popescu, Vaughan-Sarrazin, Rosenthal.
Obtained funding: Rosenthal.
Administrative, technical, or material support: Rosenthal.
Study supervision: Vaughan-Sarrazin, Rosenthal.
Financial Disclosures: None reported.
Funding/Support: This research was supported in part by award HFP 04-149 from the Health Services Research and Development Service, Veterans Health Administration, Department of Veterans Affairs. Dr Rosenthal is a Senior Quality Scholar, Office of Academic Affiliation, Veterans Health Administration. Dr Popescu is supported by a National Quality Scholars fellowship award, Office of Academic Affiliations, Veterans Health Administration, Department of Veterans Affairs.
Role of the Sponsor: The funding source had no role in the design or conduct of the study, data management or analysis, or manuscript preparation.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily represent the views of the Department of Veterans Affairs.