Development and Initial Psychometric Evaluation of the Mobility Activities Measure for Inpatient Rehabilitation Settings (Mobam-in) |
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| Affiliation: | 1. Center for Clinical Epidemiology & Biostatistics, University of Pennsylvania, USA;2. Division of Nephrology, Department of Medicine, Drexel University College of Medicine, USA;1. Institute of Neuroscience, Université Catholique de Louvain, Brussels, Belgium;2. Arsalis SPRL, Glabais, Belgium;3. Centre Interdisciplinaire de Recherche en Réadaptation et Intégration Sociale (CIRRIS), Université Laval, Quebec, Canada;4. Neuromuscular Reference Centre, Cliniques Universitaires St-Luc, Université Catholique de Louvain, Brussels, Belgium;5. Scientific Committee of the Belgian Neuromuscular Disease Registry, Belgium;6. KU Leuven – University of Leuven, Department of Neurosciences, VIB – Vesalius Research Center, Experimental Neurology – Laboratory of Neurobiology, Leuven, Belgium;7. University Hospitals Leuven, Department of Neurology, Leuven, Belgium;8. Scientific Institute of Public Health, Brussels, Belgium;9. Cliniques Universitaires Saint-Luc, Physical Medicine and Rehabilitation Department, Université Catholique de Louvain, Brussels, Belgium |
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| Abstract: | ObjectiveTo describe the development and the initial psychometric evaluation of a mobility measure for inpatient postacute rehabilitation settings—the Mobility Activities Measure for Inpatient Rehabilitation Settings (Mobam-in).DesignSelf-report–based psychometric study.SettingPostacute rehabilitation unit of a public hospital.ParticipantsA consecutive sample of inpatients (N=239) receiving postacute rehabilitation care.InterventionsNot applicable.Main Outcome MeasuresWe developed a 30-item mobility measure, using the Mobility Activities Measure (Mobam) framework, to assess functioning across 5 mobility activity domains classified within the International Classification of Functioning, Disability and Health. These were (1) changing and maintaining body position involving only sitting and/or lying (4 items); (2) changing and maintaining body position involving standing up (6 items); (3) carrying and moving objects using the hand and shoulder (6 items); (4) handling objects using only the hand and/or forearm (7 items); and (5) walking and moving (7 items). Psychometric analyses were conducted to test assumptions underlying the scaling and scoring of Mobam-in scales, and to test both the reliability and validity.ResultsMultitrait scaling and confirmatory factor analyses (with Tucker-Lewis Index median, .99; root mean square error of approximation median, .025) supported the assumption of unidimensionality concerning each domain. Five dimensions appeared to be stable across diverse diagnostic groups (the percentage of items with discriminant validity ranged from 93% to 100%, Cronbach coefficient ranged from .859 to .966). Rasch model (Masters' partial credit) showed that all items could be located along a continuum in each dimension, with goodness-of-fit criteria of infit and outfit mean-square values between 0.6 and 1.4. Test-retest reliability was excellent (intraclass correlation coefficients median, .98). Groups with more severe conditions and lower functional independence scored lower on Mobam-in scales, as hypothesized.ConclusionsMobam-in covers 5 dimensions of mobility activities. The Mobam framework is an effective reference for building outcome instruments. |
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