Published Online: April 28, 2014. doi:10.1001/jamainternmed.2014.1208.
Study concept and design: Singh, Parekh, Lee.
Acquisition, analysis, or interpretation of data: Singh, Wang, Austin, Lee.
Drafting of the manuscript: Singh, Wang, Lee.
Critical revision of the manuscript for important intellectual content: Singh, Austin, Parekh, Lee.
Statistical analysis: Wang, Lee.
Obtained funding: Lee.
Administrative, technical, or material support: Singh, Lee.
Study supervision: Austin, Lee.
Conflict of Interest Disclosures: Dr Austin is a career investigator of the Heart and Stroke Foundation of Ontario, and Dr Lee is a clinician-scientist of the Canadian Institutes of Health Research. No other disclosures are reported.
Funding/Support: This research was supported by an operating grant from the Canadian Institutes of Health Research (CIHR MOP 111150) and the Ontario Ministry of Health and Long-Term Care (MOHLTC). The Institute for Clinical Evaluative Sciences (ICES) is supported in part by a grant from the Ontario Ministry of Health and Long-Term Care.
Role of the Sponsors: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Group Members: The Ontario ICD Database Investigators members are Jeffrey S. Healey, MD, MSc, Hamilton Health Sciences Centre; Christopher S. Simpson, MD, Kingston General Hospital; Andrew D. Krahn, MD, and Raymond Yee, MD, London Health Sciences Centre; Amir Janmohammed, MD, Rouge Valley Health System; Iqwal Mangat, MD, and Paul Dorian, MD, St. Michael's Hospital; Yaariv Khaykin, MD, Southlake Regional Health Centre; Eugene Crystal, MD, Sunnybrook Health Sciences Centre; Douglas Cameron, MD, Toronto General Hospital; Catherine LeFeuvre, MD, Trillium Health Centre; and David Birnie, MD, University of Ottawa Heart Institute.
Disclaimer: The opinions, results and conclusions are those of the authors and no endorsement by the Ministry of Health and Long-Term Care or by the Institute for Clinical Evaluative Sciences is intended or should be inferred.