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Evaluating Responsiveness of the Persian Version of the Western Ontario Meniscal Evaluation Tool (WOMET) in Iranian Patients with Meniscal Injury


 Background

This study aimed to evaluate the responsiveness of Western Ontario Meniscal Evaluation Tool (WOMET) and specify its Minimal Clinically Important Difference (MCID) in patients undergoing physiotherapy intervention following undergoing a meniscal lesion or surgery. Our hypothesis was that the WOMET would have adequate responsiveness in patients with meniscal injury.
method:

100 patients undergoing physiotherapy interventions filled the Persian version of the WOMET and a questionnaire of the Knee injury and Osteoarthritis Outcome Score (KOOS) at Session 1 and Session 10 (4 weeks later). They also filled the 7-point Global Rating of Change (GRC) scale at Session 10. Internal responsiveness was calculated using T test and effect sizes (standard response mean (SRM) and Cohen's d); and external responsiveness was calculated via receiver operating characteristic curve and correlation analysis. The inclusion criterion was the age of 18 to 70 years old for the patients who had the ability of filling the questionnaire. The exclusion criteria included ligaments injury, severe osteoarthritis, inability to complete the questionnaire due to the lack of sufficient knowledge, malignancy, infection, neuromusculoskeletal disorder, rheumatologic disease, knee surgeries for any other reasons, and dissatisfaction for being enrolled in the study.
Results

All the WOMET subscales (AUC = 0.7) had acceptable external responsiveness. SRM was Trivial, and the scores of Cohen’s d were moderate to large and t tests showed significant differences.
Conclusion

Our findings showed that all of the WOMET subscales had acceptable external responsiveness, and thus this questionnaire could be used to study the effects of physiotherapy interventions on patients undergoing a meniscal lesion or surgery.