Abstract
Objective
To develop a valid stroke-specific tool, named the Participation Measurement Scale
(PM-Scale), for the measurement of participation after stroke.
Design
Observational study and questionnaire development.
Setting
Outpatient rehabilitation centers.
Participants
Patients with stroke (N=276; mean age, 58.5±11.1y; 57% men).
Interventions
Not applicable.
Main Outcome Measures
Participants completed a 100-item experimental questionnaire of the PM-Scale. Items
were scored as “not at all,” “weakly,” or “strongly.” The Hospital Anxiety and Depression
Scale was used to evaluate depression, and the modified Rankin Scale was used to categorize
the severity of disability on the basis of observation.
Results
After successive Rasch analyses using unrestricted partial credit parameterization,
a valid, unidimensional, and linear 22-item scale for the measurement of participation
was constructed. All 22 items fulfilled the measurement requirements of overall and
individual item and person fits, category discrimination, invariance, and local response
independence. The PM-Scale showed good internal consistency (person separation index,
.93). The test-retest reliability of item difficulty hierarchy (r=.96; P<.001) and patient location (r=.99; P<.001) were excellent. This patient-based scale covers all 9 International Classification
of Functioning, Disability and Health domains of participation.
Conclusions
The PM-Scale has good psychometric qualities and provides accurate measures of participation
in patients with stroke in Africa.
Keywords
List of abbreviations:
DIF (differential item functioning), HADS (Hospital Anxiety and Depression Scale), ICF (International Classification of Functioning, Disability and Health), mRS (modified Rankin Scale), PM-Scale (Participation Measurement Scale), PSI (person separation index)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: October 26, 2017
Footnotes
Supported by a cooperation for development scholarship from the Council of the International Action, University Catholic University of Louvain, Brussels, Belgium.
Disclosures: none.
Identification
Copyright
© 2017 by the American Congress of Rehabilitation Medicine
