Journal of the neurological sciences · 2011
Longitudinal measurement invariance of the Multiple Sclerosis Walking Scale-12.
Клиническое исследованиеСтатьяПоддержка исследования: вне правительства СШАВалидационное исследованиеНазвание и аннотация: Перевод в очереди
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Motl Robert W, McAuley Edward, Mullen Sean
Аннотация
OBJECTIVE: One primary assumption underlying the unambiguous interpretation of change in Multiple Sclerosis Walking Scale-12 (MSWS-12) scores over time is longitudinal measurement invariance (i.e., Is the same construct being measured over time?). Such an assumption was tested in the present study over periods of 6 and 12 months in persons with relapsing-remitting multiple sclerosis (RRMS).
METHOD: Participants completed a battery of questionnaires that included the MSWS-12 at baseline (n=269) and 6-months (n=260) and 12-months (n=252) follow-up. The data were analyzed using confirmatory factor analysis and a series of nested model comparisons in Mplus 3.0.
RESULTS: The results indicated that the unidimensional measurement model and all of its parameters (e.g., factor loadings and item intercepts) were invariant over periods of 6 and 12 months.
CONCLUSION: We provide novel evidence that supports the unambiguous interpretation of scores from the MSWS-12 as a measure of change in walking impairment over time in a sample of persons with MS.
METHOD: Participants completed a battery of questionnaires that included the MSWS-12 at baseline (n=269) and 6-months (n=260) and 12-months (n=252) follow-up. The data were analyzed using confirmatory factor analysis and a series of nested model comparisons in Mplus 3.0.
RESULTS: The results indicated that the unidimensional measurement model and all of its parameters (e.g., factor loadings and item intercepts) were invariant over periods of 6 and 12 months.
CONCLUSION: We provide novel evidence that supports the unambiguous interpretation of scores from the MSWS-12 as a measure of change in walking impairment over time in a sample of persons with MS.
Предметные рубрики MeSH
Cohort StudiesDisability EvaluationDisease ProgressionGaitGait Disorders, NeurologicHumansLongitudinal StudiesMobility LimitationMultiple Sclerosis, Relapsing-RemittingObserver VariationPredictive Value of TestsProspective StudiesSeverity of Illness IndexSurveys and QuestionnairesTime FactorsWalking