1Departments of Surgery (H.M.K.G.), Pediatrics (H.M.K.G.), and Medicine (L.S.), Center for Health Services and Outcomes Research (H.M.K.G. and R.K.), Feinberg School of Medicine of Northwestern University, Chicago, Illinois
2Department of Healthcare Policy and Research, Weill Cornell Medical College, New York, NY
3Department of Medicine, University of Alabama at Birmingham and Birmingham VA Medical Center, Birmingham, Alabama
4Department of Radiology, University of Cincinnati Medical Center, Cincinnati, Ohio
5Medical School, University of California, San Francisco, San Francisco, California
6Clinical Epidemiology Unit, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
7Departments of Physical Therapy, Orthopedics, and Rheumatology, Virginia Commonwealth University, Richmond, Virginia
aEmail address for H.M.K. Ghomrawi: [email protected]
*T. Neogi, MD, PhD, and D.L. Riddle, PT, PhD, contributed equally as senior authors.
A commentary by Michael G. Zywiel, MD, MSc, FRCSC, is linked to the online version of this article at jbjs.org.
Investigation performed at Feinberg School of Medicine of Northwestern University, Chicago, Illinois
Disclosure: This project is funded by a grant (R21-AR069867) to the first author from the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) and by a P-30 (P30-AR072579) grant from the National Institute of Arthritis and Musculoskeletal and Skin Diseases. The Osteoarthritis Initiative (OAI) is a public-private partnership comprised of 5 contracts (N01-AR-2-2258, N01-AR-2-2259, N01-AR-2-2260, N01-AR-2-2261, N01-AR-2-2262) funded by the National Institutes of Health (NIH) and conducted by the OAI Study Investigators. Private funding partners include Merck Research Laboratories, Novartis Pharmaceuticals Corporation, GlaxoSmithKline, and Pfizer, Inc. Private sector funding for the OAI is managed by the Foundation for the NIH. The Multicenter Osteoarthritis study (MOST) is comprised of 4 contracts (U01 AG18947, AG188832, AG19069, AG18820) funded by the NIH and conducted by the MOST Study Investigators. On the Disclosure of Potential Conflicts of Interest forms, which are provided with the online version of the article, one or more of the authors checked “yes” to indicate that the author had a relevant financial relationship in the biomedical arena outside the submitted work and “yes” to indicate that the author had other relationships or activities that could be perceived to influence, or have the potential to influence, what was written in this work (http://links.lww.com/JBJS/F667).
Disclaimer: This manuscript was prepared using an OAI public use data set (in addition to data obtained within NIH/NIAMS funded ancillary grants) and does not necessarily reflect the opinions or views of the OAI investigators, the NIH, or the private funding partners. This manuscript was prepared using MOST data and does not necessarily reflect the opinions or views of MOST investigators.