Published Online: May 13, 2013. doi:10.1001/jamainternmed.2013.979
Author Contributions: Drs Ishida and Grimes 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: Ishida, McCulloch, Dudley, and Johansen. Acquisition of data: Johansen. Analysis and interpretation of data: All authors. Drafting of the manuscript: Ishida. Critical revision of the manuscript for important intellectual content: All authors. Statistical analysis: Ishida, McCulloch, and Grimes. Obtained funding: Johansen. Administrative, technical, and material support: Johansen. Study supervision: McCulloch, Dudley, and Johansen.
Conflict of Interest Disclosures: Dr Grimes has received research funding from Dialysis Clinic, Inc. Dr Johansen serves on the Amgen National Nephrology Advisory Board.
Funding/Support: Drs Ishida and Johansen are supported by the National Institute of Diabetes and Digestive and Kidney Diseases (T32 DK007219 to Dr Ishida and K24DK085153 and N01-DK-7-0005 to Dr Johansen).
Role of the Sponsors: The National Institute of Diabetes and Digestive and Kidney Diseases had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.
Disclaimer: 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.
Previous Presentation: This study was presented in part as a poster at Kidney Week 2012 (annual meeting of the American Society of Nephrology); November 2, 2012; San Diego, California.