Author Contributions: Dr Burton 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: Burton, Edwards, Horan, Fridkin.
Acquisition of data: Edwards, Horan.
Analysis and interpretation of data: Burton, Edwards, Horan, Jernigan, Fridkin.
Drafting of the manuscript: Burton, Edwards, Horan, Jernigan, Fridkin.
Critical revision of the manuscript for important intellectual content: Burton, Edwards, Horan, Jernigan, Fridkin.
Statistical analysis: Burton, Edwards.
Administrative, technical, or material support: Edwards, Horan, Jernigan.
Study supervision: Fridkin.
Financial Disclosures: None reported.
Funding/Support: No specific funding was provided for this analysis. The Division of Healthcare Quality Promotion, CDC, employed all authors of this article.
Role of the Sponsor: No commercial entity had any role in this work. The Division of Healthcare Quality Promotion, CDC, is responsible for the National Nosocomial Infections Surveillance System and the National Healthcare Safety Network and for managing the data submitted by participating health care facilities. The authors, not the agency, were solely responsible for the design and conduct of the study; analysis and interpretation of the data; and preparation, review, and approval of the manuscript.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent official views of the CDC.
Previous Presentations: Preliminary versions of data included in this manuscript were presented as abstracts at the 18th Annual Scientific Meeting of the Society for Healthcare Epidemiology of America (SHEA), Orlando, Florida, 2008.
Additional Contributions: We acknowledge the exceptional work of the infection control and hospital epidemiology staff performing surveillance as part of the National Nosocomial Infections Surveillance system and National Healthcare Safety Network.