Article

OBJECTIVE: 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. DESIGN: Cross-sectional study. SUBJECTS: A total of 100 subjects (median
age 58 years; 46 males; median body mass index 23.8) who had recently undergone
lower limb amputation. METHODS: 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. RESULTS: 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). CONCLUSION:
Although further studies are needed to increase confidence in clinical use of the
PMQ, this new questionnaire appears to be a promising, psychometrically-sound
patient-reported outcome measure for assessment of mobility in subjects with
lower limb amputation who use a prosthesis.

Langue : ANGLAIS