Author Contributions: Dr Gill 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: Tonelli, Klarenbach, Gill.
Acquisition of data: Wiebe, Gill.
Analysis and interpretation of data: Tonelli, Klarenbach, Rose, Gill.
Drafting of the manuscript: Tonelli, Rose.
Critical revision of the manuscript for important intellectual content: Tonelli, Klarenbach, Rose, Wiebe, Gill.
Statistical analysis: Rose, Wiebe, Gill.
Obtained funding: Gill.
Administrative, technical, or material support: Wiebe
Study supervision: Tonelli, Gill.
Financial Disclosures: None reported.
Funding/Support: Drs Tonelli and Klarenbach were supported by Population Health Investigator Awards from the Alberta Heritage Foundation for Medical Research and by a joint initiative between Alberta Health and Wellness and the University of Alberta. Dr Tonelli was also supported by a New Investigator Award from the Canadian Institutes of Health Research. Dr Gill was supported by the Michael Smith Foundation for Medical Research.
Role of the Sponsor: The funding organizations played no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and 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 official policy or interpretation of the US government.
Additional Contributions: We thank Sophanny Tiv, BSc, Alberta Kidney Disease Network, for assistance with graphics, creation of which is a regular part of her work.
This article was corrected online for typographical errors on 4/24/2009.