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Convergent and Known-Groups Validity and Sensitivity to Change of the Virtual Performance Measure in Patients With Hip and Knee Osteoarthritis: Longitudinal Study

Convergent and Known-Groups Validity and Sensitivity to Change of the Virtual Performance Measure in Patients With Hip and Knee Osteoarthritis: Longitudinal Study

The preoperative LEFS and VPM scores were compared with postoperative scores, and the magnitude of change over time was examined using paired, 1-tailed t test statistics. The analysis of covariance was used to examine the role of age, sex, and severity score on postoperative VPM scores after adjusting for the preoperative level of functional difficulty. Interactions among independent variables were explored.

Helen Razmjou, Suzanne Denis, Susan Robarts, Amy Wainwright, Patricia Dickson, John Murnaghan

JMIR Form Res 2025;9:e69001