Author Contributions: Dr Curtis 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: Curtis, Hammill, Krumholz.
Acquisition of data: Curtis, Luebbert, Hammill, Krumholz.
Analysis and interpretation of data: Curtis, Luebbert, Wang, Rathore, Chen, Heidenreich, Hammill, Lampert, Krumholz.
Drafting of the manuscript: Curtis, Luebbert, Hammill.
Critical revision of the manuscript for important intellectual content: Curtis, Wang, Rathore, Chen, Heidenreich, Hammill, Lampert, Krumholz.
Statistical analysis: Wang, Chen.
Obtained funding: Curtis, Hammill, Krumholz.
Administrative, technical, or material support: Hammill.
Study supervision: Curtis, Hammill.
Financial Disclosures: Dr Krumholz reported being a consultant or a subject matter expert for VHA Inc, having research contracts with the American College of Cardiology, the Colorado Foundation for Medical Care, and the Centers for Medicare & Medicaid Services, being on an advisory board for UnitedHealthcare, Alere, and Amgen, providing testimony on behalf of plaintiffs in the Vioxx trial, serving as editor-in-chief of Circulation: Cardiovascular Quality and Outcomes and Journal Watch Cardiology of the Massachusetts Medical Society, and participating in early phase translational research activities for Centegen/LifeTech. No other authors reported disclosures.
Funding/Support: This analysis was funded by the ICD Registry, which oversees the collection and management of data in the registry, and by the Clinical and Translational Science Award grant UL1 RR024139 from the National Center for Research Resources, a component of the National Institutes of Health, and National Institutes of Health roadmap for Medical Research.
Role of the Sponsors: The ICD Registry and the National Center for Research Resources had no role in the design or conduct of the study; the management, analysis, or interpretation of the data. The manuscript was approved with only minor editorial changes by the ICD Registry Research and Publications Committee prior to manuscript submission.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily represent the official view of the National Center for Research Resources or the National Institutes of Health.
Previous Presentation: Presented in part at the 2008 Scientific Sessions of the American Heart Association; November 8-12, 2008; New Orleans, Louisiana.