Published Online: October 22, 2012. doi:10.1001/archinternmed.2012.4504
Author Contributions: Dr Frank had full access to all of the study data, which are publicly available from the National Center for Health Statistics, and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Frank, Ayanian, and Linder. Acquisition of data: Frank. Analysis and interpretation of data: Frank, Ayanian, and Linder. Drafting of the manuscript: Frank and Linder. Critical revision of the manuscript for important intellectual content: Ayanian and Linder. Statistical analysis: Frank and Linder. Obtained funding: Ayanian. Administrative, technical, and material support: Linder. Study supervision: Frank, Ayanian, and Linder.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Frank is supported by the Health Resources and Services Administration through an institutional National Research Service Award (T32HP10251).
Role of the Sponsor: The Health Resources and Services Administration had no role in the design or conduct of the study; the collection, management, analysis or interpretation of the data; or the preparation, review or approval of the manuscript.
Previous Presentation: An abstract of this study was presented at the Society of General Internal Medicine Annual Meeting; May 9, 2012; Orlando, Florida.