Necessity for interrupted time series to analyze the effects of propoxyphene withdrawal from the market and health outcome trend estimates.
Arthritis & rheumatology (Hoboken, N.J.)
We read with great interest the study by Curtis et al.1that examines time trends of opioid use among older adults with rheumatoid arthritis (RA) in the United States. We think that certain additional methodologic and health policy considerations are necessary. First, the authors did not specify the selection process in the methods and did not specify missing value rates before selecting patients for analysis. This article is protected by copyright. All rights reserved.
- 1Department of Internal Medicine, University of Nevada Las Vegas School of Medicine, Las Vegas, Nevada.
- 2University of Nevada Reno School of Medicine, Reno, Nevada.
- 3University of Nevada Reno School of Medicine, Reno, Nevada.
- 4Division of Rheumatology, University of South Florida Morsani College of Medicine, Tampa, Florida.
- 5Department of Family Medicine, Yonsei University College of Medicine, Seoul, Korea.
- 6Department of Internal Medicine, University of Nevada Las Vegas School of Medicine, Las Vegas, Nevada.
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