Author Contributions: Dr Redelmeier 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: Redelmeier.
Acquisition of data: Redelmeier.
Analysis and interpretation of data: Redelmeier, Tibshirani.
Drafting of the manuscript: Redelmeier.
Critical revision of the manuscript for important intellectual content: Redelmeier, Tibshirani.
Statistical analysis: Redelmeier, Tibshirani.
Obtained funding: Redelmeier.
Administrative, technical, or material support: Redelmeier.
Financial Disclosures: None reported.
Funding/Support: This work was supported by the Canada Research Chair in Medical Decision Sciences, the Canadian Institutes of Health Research, the National Institutes of Health Resuscitation Outcomes Consortium, and the Patient Safety Service of Sunnybrook Health Sciences Centre.
Role of the Sponsors: The funding sources had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.