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High activity scores provide a lower ceiling effect for patient knee outcome measures
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BERLIN — High-level activity outcome measures better detect differences in patient scores after total knee arthroplasty than traditional patient-reported outcome questionnaires, according to a study presented at the 13th EFORT Congress 2012, here.
When comparing the Knee Society and Oxford scores against the High Activity Arthroplasty Score and Activity Scale for Arthroplasty Patients high activity scores, researchers from the University Hospital of Strasbourg in Illkirch, France, found that the traditional scores presented more difficulties in distinguishing between patients with satisfactory scores.
“The Knee Society score and Oxford score have a significant ceiling effect after total knee replacement, and thus makes it difficult to detect subtle differences between patients with a satisfactory result after the operation,” Yann Diesinger, MD, said. “Scores of high activity are more stringent and allow better analysis of the most favorable results.”
The ceiling effect for the Knee Society score was 51%, while the Oxford score carried a 36% ceiling effect, according to the abstract. In contrast, the High Activity Arthroplasty Score had a 19% ceiling effect, while the Activity Scale for Arthroplasty Patients had a 23% effect. Validity of each score was determined using the alpha Cronbach coefficient and the comparison between each score was performed using both the linear and Spearman correlation coefficient, according to the abstract.
Reference:
- Jenny J-Y, Louis P, Diesinger Y. High activity scores after total knee replacement. Paper #12-2409. Presented at the 13th EFORT Congress 2012. May 23-25. Berlin.
- Disclosure: Diesinger has no relevant financial disclosures
