Accepted for Publication: December 19, 2011.
Author Contributions: Ms McGrath and Drs Wang and Brookhart had full access to all 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: McGrath, Kshirsagar, Cole, Wang, Weber, Stürmer, and Brookhart. Acquisition of data: Wang and Brookhart. Analysis and interpretation of data: McGrath, Kshirsagar, Cole, Weber, Stürmer, and Brookhart. Drafting the manuscript: McGrath, Kshirsagar, and Brookhart. Critical revision of the manuscript for important intellectual content: Kshirsagar, Cole, Wang, Weber, Stürmer, and Brookhart. Statistical analysis: McGrath, Cole, Wang, Stürmer, and Brookhart. Obtained funding: Brookhart. Administrative, technical, and material support: Wang and Weber. Study supervision: Kshirsagar, Weber, and Brookhart.
Financial Disclosure: Dr Weber serves as consultant and speaker for Merck, Pfizer, and sanofi pasteur. Dr Brookhart received research support from Amgen; has served as a scientific advisor for Amgen, Rockwell Medical, and Pfizer (with honoraria declined, donated, or paid to the institution); and has received consulting fees from Crimson Health, DaVita Clinical Research, the Foundation for the National Institutes of Health, and World Health Information Consultants. Dr Stürmer received salary support from the University of North Carolina (UNC) Center of Excellence in Pharmacoepidemiology and Public Health and receives salary support from unrestricted research grants from pharmaceutical companies to UNC.
Funding/Support: This study was supported by an unrestricted fellowship from the UNC-GlaxoSmithKline Center of Excellence in Pharmacoepidemiology and Public Health at the Gillings School of Global Public Health.
Role of the Sponsors: The sponsor had no role in the study design, data analysis, or manuscript preparation. The data reported herein have been supplied by the US Renal Data System. The interpretation and reporting of these data are the responsibility of the authors and in no way should be seen as an official policy or interpretation of the US government.
Additional Contributions: Amanda Patrick, MS, provided feedback on aspects of the study design.