Article

OBJECTIVE: To evaluate the construct validity of a new rating scale for
self-reported impairments in persons with late effects of polio. DESIGN:
Psychometric analysis of data on self-perceived impairments in persons with prior
polio. PARTICIPANTS: Two hundred seventy-three persons with prior polio (119 men
and 154 women; mean age, 63.5 years). METHOD: Rasch analysis of a 13-item rating
scale with 5 response categories, in which the participants rated how much they
have been bothered by various post-polio-related impairments during the past 2
weeks. RESULTS: The initial analysis showed disordered categories, misfit with
some of the items, multidimensionality, and local dependency. After adjustment of
the categories, which resulted in a 4-category rating scale, fit to the model was
achieved, but the scale still showed signs of multidimensionality. Analyses of
local dependency revealed correlations among some of the items, which resulted in
a 5 testlet solution, which gave fit to the model and unidimensionality.
CONCLUSION: After adjustment of the categories and local dependency, this new
rating scale, Self-Reported Impairments in Persons With Late Effects of Polio,
can be considered as unidimensional. The good psychometric properties implies
that the Self-Reported Impairments in Persons With Late Effects of Polio scale
could be a useful rating scale that would increase our understanding of the
impairments that persons with late effects of polio can experience. With further
refinements, this scale may assist in the planning and evaluation of appropriate
rehabilitation interventions.
CI - Copyright (c) 2013 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS