Funding for this research was provided by:
National Institute of Arthritis and Musculoskeletal and Skin Diseases (1R01AR067743‐01, R01AR067743-02S1, R01AR071440-01A1, 5-P60-AR30701)
National Institute on Aging (P30-AG-028716)
Received: 1 May 2018
Accepted: 21 March 2019
First Online: 9 April 2019
Ethics approval and consent to participate
: The JoCo OA Project has been continuously approved by the institutional review boards of the University of North Carolina at Chapel Hill (parent study 92–0583; this specific analysis 14–3273) and the Centers for Disease Control and Prevention (#1820.0). All participants in the JoCo OA Project provided written consent to participate in this study.
: Not applicable
: All authors have no financial or personal relationships with other people that could potentially or inappropriately bias their work and conclusions. Dr. Amanda Nelson serves an Associate Editor with BMC Musculoskeletal Disorders.
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