Accepted for Publication: September 25, 2011.
Published Online: December 12, 2011. doi:10.1001/archinternmed.2011.1029
Author Contributions: Dr Garrison had full access to all the study data, takes responsibility for the integrity of the data and the accuracy of the data analysis, and had final responsibility for the decision to submit the manuscript for publication. Study concept and design: Garrison and Dormuth. Acquisition of data: Morrow and Carney. Analysis and interpretation of data: Garrison, Dormuth, and Khan. Drafting of the manuscript: Garrison. Critical revision of the manuscript for important intellectual content: Garrison, Dormuth, Morrow, Carney, and Khan.
Financial Disclosure: None reported.
Funding/Support: This study was funded through general operations of the Therapeutics Initiative Pharmacoepidemiology Working Group as part of the British Columbia Pharmacovigilance Project (ie, funded by the government of British Columbia). Dr Garrison was funded by a Doctoral Research Award from the Institute of Aging, Canadian Institutes of Health Research (CIHR). Dr Khan was funded by a CIHR Emerging Team Grant.
Role of the Sponsors: The sponsors had no role in designing the study or in collecting, analyzing, or interpreting the data. The writing of the article and the decision to submit for publication was solely the responsibility of the authors.
Additional Contributions: Penny M. A. Brasher, PhD, provided statistical support, and Shannon Long, MLIS, assisted with the literature retrieval.