ArticleArthritis care & research2026
Longitudinal Trajectories of Pain Sensitization Over Nine Years in People With or at Risk of Knee Osteoarthritis.
Article in Arthritis care & research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivePain sensitization is common in knee osteoarthritis (OA) and is associated with pain severity and functional limitations. Whether pain sensitization is induced by OA or it may be an inherent trait remains unclear. We evaluated pain sensitization trajectories and their relations to symptoms in people with or at risk of knee OA.
methodsWe used data from four study visits of the Multicenter Osteoarthritis Study over a nine-year period. We agnostically identified pain sensitization trajectory groups defined by wrist and knee pressure pain thresholds (PPTs) over nine years using group-based trajectory methods stratified by sex. We evaluated the relations of the wrist and knee PPT trajectory groups to Western Ontario and McMaster Universities Arthritis Index (WOMAC) knee pain and function at the final visit using separate linear regression models.
resultsWe included 1,271 participants (mean age 65 years, 61% female, mean body mass index 31 kg/m
conclusionWe identified stable but distinct pain sensitization trajectories over nine years despite likely changes in disease course and treatments over time, suggesting that individuals with knee OA may be predisposed to having different degrees of sensitization as an inherent trait, which in turn likely influences their pain experience and functional status.
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