Rasch validation of the Prosthetic Mobility Questionnaire: A new outcome measure for assessing mobility in people with lower limb amputation

Journal of Rehabilitation Medicine
Franco FranchignoniBarbara Rocca

Abstract

To create a new outcome measure of mobility in people with lower limb amputation, based on a pool of 14 items assessing prosthetic mobility, comprising the 12-item Prosthesis Evaluation Questionnaire (Mobility Section) plus 2 new items. Cross-sectional study. A total of 100 subjects (median age 58 years; 46 males; median body mass index 23.8) who had recently undergone lower limb amputation. Each patient completed the 14-item questionnaire twice: (i) at admission to the rehabilitation unit for prosthetic rehabilitation training; (ii) at 6-month follow-up after discharge. After Rasch analysis, 2 items were deleted (one due to misfit, the other because showing large (>  0.30) positive correlation of residuals with two other items (local dependence). The remaining items fitted the Rasch model (internal construct validity), giving a new 12-item scale with a 5-level response format, the Prosthetic Mobility Questionnaire (PMQ), which demonstrated unidimensionality, lack of differential item functioning, and good reliability indices (person-separation reliability = 0.87; Cronbach's alpha 0.88). Although further studies are needed to increase confidence in clinical use of the PMQ, this new questionnaire appears to be a promising, psych...Continue Reading

Citations

Aug 25, 2015·Archives of Physical Medicine and Rehabilitation·Josephine McMurrayPaul Stolee
Jan 3, 2018·International Journal of Rehabilitation Research. Internationale Zeitschrift Für Rehabilitationsforschung. Revue Internationale De Recherches De Réadaptation·Charla L HowardDobrivoje S Stokic
Jun 19, 2019·International Journal of Rehabilitation Research. Internationale Zeitschrift Für Rehabilitationsforschung. Revue Internationale De Recherches De Réadaptation·Helena BurgerFranco Franchignoni
Nov 24, 2020·Archives of Physical Medicine and Rehabilitation·Franco FranchignoniHelena Burger
Jan 5, 2021·International Journal of Rehabilitation Research. Internationale Zeitschrift Für Rehabilitationsforschung. Revue Internationale De Recherches De Réadaptation·Helena BurgerFranco Franchignoni
Aug 5, 2021·Archives of Orthopaedic and Trauma Surgery·Marcus ÖrgelMarcel Winkelmann
May 26, 2021·International Journal of Rehabilitation Research. Internationale Zeitschrift Für Rehabilitationsforschung. Revue Internationale De Recherches De Réadaptation·Alexander RankerFranco Franchignoni

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