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The data for both studies were obtained from the CDC-funded Johnston County Osteoarthritis Project (JoCoOA) in Smithfield, NC.

For 30 years, JoCoOA has established itself as one of the premier longitudinal research studies world-wide regarding the epidemiology of osteoarthritis.


The first study, published in ACR Open Rheumatology, describes the prevalence of knee outcomes at four time points from 1999 to 2018 in the JoCoOA.

  • Nelson AE, Hu D, Arbeeva L, Alvarez C, Cleveland RJ, Schwartz TA, Murphy LB, Helmick CG, Callahan LF, Renner JB, Jordan JM, Golightly YM. The Prevalence of Knee Symptoms, Radiographic, And Symptomatic Osteoarthritis at Four Time Points: The Johnston County Osteoarthritis Project, 1999-2018ACR Open Rheumatology. 2021 in press.

The second, published in Arthritis Care and Research, describes the association between loss of joint space width over time and development of hip OA in men and women.

  • Nelson AE, Smith JA, Alvarez C, Arbeeva L, Renner JB, Murphy LB, Jordan JM, Golightly YM, Duryea J. Associations between baseline and longitudinal semi-automated quantitative joint space width at the hip and incident hip osteoarthritis: Data from a community-based cohortArthritis Care Res (Hoboken). 2021 Jul 5. doi: 10.1002/acr.24742. Epub ahead of print. PMID: 34219398.