Article

The assessment of patient satisfaction with the orthosis is a key point for
clinical practice and research, requiring the availability of questionnaires with
robust psychometric properties. The aim of this study was the translation into
Arabic and Rasch validation of the Quebec User Evaluation of Satisfaction with
assistive Technology (A-QUEST 2.0), one of the few standardized instruments
appropriate for assessment of patient satisfaction with the orthosis. The
translation was carried out in accordance with guideline recommendations. The
translated version was administered to a convenience sample of 100 individuals
with various health conditions using orthosis (59% men, mean age 36 years). Data
were analyzed using confirmatory factor analysis, followed by Rasch analysis for
each of the two subscales, that is satisfaction with the Device (eight items) and
with Services (four items). The results of the confirmatory factor analysis
verified the bidimensionality of A-QUEST 2.0. Rasch criteria for the functioning
of rating scale categories were fulfilled for both subscales. All items except
one showed an adequate fit to the Rasch model. The person separation reliability
for A-QUEST 2.0_Device was 2.19 and Cronbach's alpha 0.83; A-QUEST 2.0_Services
separation reliability was 2.79 and Cronbach's alpha was 0.89. Thus, the two
subscales could define a hierarchy of persons along each measured construct with
at least three different levels of satisfaction. This Rasch validation of A-QUEST
2.0, in patients with various types of orthoses, provides additional evidence of
the psychometric properties (and particularly the internal construct validity) of
the questionnaire, and provides insights for further improving its metric
quality.

Langue : ANGLAIS