Article

OBJECTIVE: To develop a Rasch-based version of a mobility questionnaire
(MobQues28) for children with cerebral palsy (CP). DESIGN: Cross-sectional study.
SETTING: Private physical therapy practices and outpatient departments of
hospitals and rehabilitation centers. PARTICIPANTS: Parents of 323 ambulatory
children with CP (Gross Motor Function Classification System [GMFCS] level I-IV;
aged, 2-13y). INTERVENTIONS: Not applicable. The mobility
questionnaire measures mobility limitations in children with CP by rating the
difficulty of executing 47 mobility activities, as reported by the parents. Items
for the Rasch-based version were selected based on fit to the Rasch measurement
(partial credit) model and invariance of item characteristics across GMFCS level,
age group, or sex. RESULTS: Analysis revealed a fitting model when nonambulant
and/or 2- and 3-year aged children were excluded (leaving a final sample of
n=246) and answering categories were collapsed from 9 to 5. Thirteen items were
removed from the questionnaire due to misfit to the model, 5 because of
disordered thresholds, and 1 because of invariance across age group. Twenty-eight
items out of the original 47 items showed good fit to the model. CONCLUSIONS: The
28-item version of the mobility questionnaire (MobQues28) provides sound
measurement properties for measuring mobility limitations in ambulant children
with CP, aged 4 to 13 years, and shows promise as an instrument for research
purposes.
CI - Copyright (c) 2011 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS