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The development and validation of the impact of multiple sclerosis scale and the symptoms of multiple sclerosis scale

journal contribution
posted on 2006-06-01, 00:00 authored by L McMillan, Kathleen Moore
Objective

To develop and validate the Impact of Multiple Sclerosis Scale (IMSS) and the Symptoms of Multiple Sclerosis Scale (SMSS) using the Extended Disability Status Scale (EDSS) for construct validity.
Design

Panel design involving test-retest over 4 months.
Setting

A mailed survey.
Participants

Volunteers with a diagnosis of multiple sclerosis (MS) recruited from an MS support service in Australia: 193 people (mean age, 39y) and 150 people participated at time 1 and time 2, respectively.
Interventions

Not applicable.
Main Outcome Measures

Principal components analyses, the Cronbach α, and descriptive statistics for the 2 scales; correlations for construct validity with the EDSS and retest; and confirmatory factor analysis to test the stability of IMSS and SMSS components over time.
Results

The IMSS yielded 5 independent and reliable components; the SMSS yielded 3 components; both component structures were stable over time. These scales showed convergent validity with the EDSS.
Conclusions

The IMSS and SMSS are psychometrically sound scales suitable for clinical and research purposes to assess the symptoms and impact of MS.

History

Journal

Archives of physical medicine and rehabilitation

Volume

87

Issue

6

Pagination

832 - 840

Publisher

W.B. Saounders Co. Ltd.

Location

Philadelphia, PA

ISSN

0003-9993

eISSN

1532-821X

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2006, American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

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