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: Zhang, Delzell, Chen, Curtis.
Acquisition of data: Curtis.
Analysis and interpretation of data: Zhang, Xie, Delzell, Chen, Winthrop, Lewis, Saag, Baddley, Curtis.
Drafting of the manuscript: Zhang, Delzell, Winthrop, Curtis.
Critical revision of the manuscript for important intellectual content: Zhang, Xie, Delzell, Chen, Lewis, Saag, Baddley, Curtis.
Statistical analysis: Zhang, Xie, Delzell, Chen, Winthrop, Curtis.
Obtained funding: Curtis.
Administrative, technical, or material support: Zhang, Winthrop, Baddley, Curtis.
Study supervision: Saag, Curtis.
Conflict of Interest Disclosures: Dr Zhang reported having received research support from Amgen. Dr Delzell reported having received research support from Amgen. Dr Winthrop reported having received consulting fees from Pfizer, Amgen, UCB, and Abbott and grants from Pfizer. Dr Lewis reported having received research grants from Centocor, Takeda, and Shire and having served as a consultant for Amgen, Abbott, Pfizer, and Millennium Pharmaceuticals. Dr Saag is the chair of the American College of Rheumatology Quality of Care Committee and reported having received consulting fees from Merck. Dr Baddley reported having received consulting fees from Abbott and Merck. Dr Curtis reported having received research grants and consulting fees from Amgen, UCB, Abbott, Genentech/Roche, Centocor, BMS, and Merck. No other disclosures were reported.
Funding/Support:This project was supported by the Agency for Healthcare Research and Quality (AHRQ) (R01 HS018517). Dr Zhang received support from the AHRQ (T32HS013852), and Dr Curtis received support from the National Institutes of Health (AR 053351).
Role of the Sponsor: The funding sponsors 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.
Online-Only Material: The Author Audio Interview is available here.