Accepted for Publication: November 29, 2011.
Author Contributions: Ms Fernandez and Drs Leblanc, Arheart, and Lee had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Fernandez, McClure, and Lee. Acquisition of data: Fernandez, LeBlanc, and Arheart. Analysis and interpretation of data: McClure, LeBlanc, Clarke, Kirsner, and Arheart. Drafting of the manuscript: Fernandez, and McClure. Critical revision of the manuscript for important intellectual content: Fernandez, McClure, LeBlanc, Clarke, Kirsner, Arheart, and Lee. Statistical analysis: LeBlanc and Arheart. Obtained funding: Lee. Administrative, technical, and material support: Fernandez, McClure, Clarke, Arheart, and Lee. Study supervision: Fernandez and Lee.
Financial Disclosure: None reported.
Funding/Support: The study was fully funded by Bankhead Coley Cancer Research Program grant 1BG06-341963 (Dr Lee).
Role of the Sponsors: The sponsors had no role in the design and conduct of the study; in the collection, analysis, and interpretation of data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: The US Department of Health and Human Services and the National Center for Health Statistics collected and compiled the data in the National Health Interview Survey (NHIS). The collector of the original data bears no responsibility for the analyses or interpretations presented in this publication. The Research Data Center conducted our analyses.