Assessment of the structural validity of three foot and ankle specific patient-reported outcome measures
Ponkilainen, V. T., Tukiainen, E. J., Uimonen, M. M., Häkkinen, A., & Repo, J. P. (2020). Assessment of the structural validity of three foot and ankle specific patient-reported outcome measures. Foot and Ankle Surgery, 26(2), 169-174. https://doi.org/10.1016/j.fas.2019.01.009
Published inFoot and Ankle Surgery
© 2019 European Foot and Ankle Society
Background The structural validity of the Lower extremity functional scale (LEFS), the Visual analogue scale foot and ankle (VAS-FA), and the Western Ontario and McMaster Universities osteoarthritis index (WOMAC) has not been compared earlier in patients after foot and ankle surgery. Methods Altogether 165 previously operated patients completed the foot and ankle specific instruments, the 15D health-related quality of life (HRQoL) instrument, and general health (VAS). Results The LEFS, the VAS-FA and the WOMAC had slight differences in their measurement properties. The VAS-FA had the best targeting and coverage. All three foot and ankle measures accounted for mobility and usual activities when compared to the different aspects of generic HRQoL. Conclusions The LEFS, the VAS-FA and the WOMAC have relatively similar psychometric properties among foot and ankle patients, yet the VAS-FA provides the best targeting and coverage.
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