Identifying an important change estimate for the Multiple Sclerosis Walking Scale-12 (MSWS-12v1) for interpreting clinical trial results.
Mult Scler J Exp Transl Clin
; 1: 2055217315596993, 2015.
Article
em En
| MEDLINE
| ID: mdl-28607701
ABSTRACT
BACKGROUND:
The 12-question Multiple Sclerosis Walking Scale (MSWS-12v1) is a widely-used patient-reported outcome (PRO) measure of walking ability in multiple sclerosis (MS).OBJECTIVE:
To estimate the magnitude of an important change in MSWS-12v1 scores for the interpretation of meaningful subject-level improvements across a 6-month trial of MS patients with walking disability.METHODS:
MOBILE was a 6-month exploratory study assessing fampridine's effect on walking ability in 132 people with MS. Three PRO measures assessed walking ability MSWS-12v1, EuroQol 5-Dimension-5 Level (EQ-5D-5L) mobility question, and a patient global impression of change (PGIC) in overall walking ability. Pre-specified anchor- and distribution-based analyses estimated the MSWS-12v1 change scores representing an important change for participants. Results were triangulated to propose a single best value indicating meaningful improvement.RESULTS:
Using baseline to week 2 through week 24 change scores, anchor-based analyses demonstrated mean and median improvements of 5.2-6.6 (PGIC) and 9.7-13.4 (EQ-5D-5L mobility) points on the MSWS-12v1, indicating meaningful improvements. The distribution-based estimate was 6.8 points. Triangulation across the results suggested an 8-point reduction in MSWS-12v1 score represents an important subject-level change in these participants.CONCLUSION:
In similar MS clinical trials, an 8-point improvement on the MSWS-12v1 is a reasonable estimate of meaningful improvement in walking ability.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article