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Study: Pincer deformity was not associated with OA development
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Researchers of this study found that acetabular dysplasia, not pincer deformity, was significantly associated with development of osteoarthritis.
They enrolled 720 participants from Cohort Hip and Cohort Knee (CHECK) with symptoms of early osteoarthritis (OA) of knee or hip and obtained standardized anteroposterior pelvic radiographs and false profile radiographs at baseline and 5-years follow-up. In both radiographic views, researchers measured mild dysplasia by a center edge angle of less than 25°; and pincer deformity by a center edge angle of greater than 40°. Researchers expressed the strength of association between those parameters at baseline and development of incident OA in odds ratio adjusted for Kellgren and Lawerence grade, age, body mass index and sex using generalized estimating equations.
Overall, 76% of the included hips had no signs of radiographic OA at baseline. According to the study abstract, 7% developed incident OA within 5 years. Researchers found acetabular dysplasia was significantly associated with development of incident OA.
"However, a pincer deformity was not associated with OA, and might even have a protective effect on its development, which questions the supposed detrimental effect of pincer impingement,” the authors wrote in their abstract."
Disclosure: The researchers report no relevant financial disclosures.
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