Study concept and design: Warner, Berge.
Acquisition of data: Warner, Berge, Sun, Harman.
Analysis and interpretation of data: Warner, Berge, Harman, Hanson, Schroeder.
Drafting of the manuscript: Warner, Berge.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Warner, Sun, Harman, Hanson, Schroeder.
Administrative, technical, or material support: Berge, Harman.
Study supervision: Warner.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Warner is a director of the American Board of Anesthesiology. Dr Berge chairs the American Society of Anesthesiologists Task Force on Chemical Dependency and is vice president of the Minnesota Board of Medical Practice. No other disclosures were reported.
Funding/Support: The American Board of Anesthesiology provided support for the collection and management of the data by allowing staff time to be used for this purpose. Funds from Mayo Foundation supported the analysis of the deidentified data. The REDCap system used to abstract the data is supported by the National Institutes of Health Clinical and Translational Science Award at Mayo Clinic (grant UL1TR000135).
Role of the Sponsor: The board of directors of the American Board of Anesthesiology reviewed and approved the submission of this manuscript. The American Board of Anesthesiology, Mayo Foundation, and NIH had no other role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; or decision to submit the manuscript for publication.
Additional Contributions: We thank Linda Parrish of the American Board of Anesthesiology, Raleigh, North Carolina, for her help with data abstraction, performed as part of her job responsibilities.