Author Contributions: Dr Chan 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: Chan, Nallamothu.
Acquisition of data: Chan, Nichol.
Analysis and interpretation of data: Chan, Nichol, Krumholz, Spertus, Jones, Peterson, Rathore, Nallamothu.
Drafting of the manuscript: Chan, Nallamothu.
Critical revision of the manuscript for important intellectual content: Chan, Nichol, Krumholz, Spertus, Jones, Peterson, Rathore, Nallamothu.
Statistical analysis: Chan, Jones.
Obtained funding: Chan.
Study supervision: Chan, Nichol, Krumholz, Spertus, Peterson, Rathore, Nallamothu.
Financial Disclosures: Dr Nichol reported having served as a consultant to Northfield Laboratories; having received travel compensation from INNERcool Inc and Radiant Medical Inc; having received research grant funding from Medtronic and the National Heart, Lung, and Blood Institute; having received equipment donations for overseas medical missions from Medtronic Physio-Control and Laerdal Inc; and having served on advisory boards with the American Heart Association and the Medic One Foundation. Drs Chan, Krumholz, Spertus, Peterson, and Nallamothu and Messrs Jones and Rathore did not report any financial disclosures.
Funding/Support: The American Heart Association provided funding for the collection and management of the data and reviewed and approved the final manuscript.
Role of the Sponsor: The American Heart Association had no role in the design and conduct of this study, in the analysis or interpretation of the data, or the preparation of the manuscript.
American Heart Association National Registry of Cardiopulmonary Resuscitation (NRCPR) Investigators: E. Allen, R. Berg, S. Braithwaite, P. Chan (study author), B. Eigel, R. Geocadin, E. Hunt, K. Kern, T. Mader, D. Magid, M. Mancini, V. Nadkarni, G. Nichol (study author), T. Noel, J. Ornato, M. Peberdy, J. Potts, T. Truitt, and S. Warren.
Disclaimer: Dr Peterson, a JAMA contributing editor, was not involved in the editorial review of or decision to publish this article.