Author Contributions: Dr Fromme has 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: Fromme, Schmidt, Tolle.
Acquisition of data: Zive, Olszewski.
Analysis and interpretation of data: Fromme, Schmidt, Tolle.
Drafting of the manuscript: Fromme, Olszewski, Tolle.
Critical revision of the manuscript for important intellectual content: Fromme, Zive, Schmidt, Tolle.
Statistical analysis: Fromme.
Obtained funding: Tolle.
Administrative, technical or material support: Zive, Olszewski.
Study supervision: Schmidt.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Fromme reported grant funding paid to his institution by The Greenwall Foundation; and travel reimbursement from the National Cancer Institute. Dr Tolle reported grant funding paid to her institution by The Greenwall Foundation, The Oregon Community Foundation, The Kinsman Foundation, The Retirement Research Foundation, California HealthCare Foundation, and The Samuel S. Johnson Foundation; and travel reimbursement from the University of Chicago. No other disclosures were reported.
Funding/Support: The Greenwall Foundation funded the initial development of the Oregon POLST Registry. Dr Fromme was supported by a Cancer Prevention Control, Behavioral, and Population Sciences Career Development Award K07CA109511 from the National Cancer Institute.
Role of the Sponsor: The sponsor had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.