Abstract:
BACKGROUND:The modified Dynamic Gait Index (mDGI), developed from a person-environment model of mobility disability, measures mobility function relative to specific environmental demands. The framework for interpreting mDGI scores relative to specific environmental dimensions has not been investigated. OBJECTIVE:The aim of this study was to examine the person-environmental model underlying the development and interpretation of mDGI scores. DESIGN:This was a cross-sectional, descriptive study. METHODS:There were 794 participants in the study, including 140 controls. Out of the total study population, 239 had sustained a stroke, 140 had vestibular dysfunction, 100 had sustained a traumatic brain injury, 91 had gait abnormality, and 84 had Parkinson disease. Exploratory factor analysis was used to investigate whether mDGI scores supported the 4 environmental dimensions. RESULTS:Factor analysis showed that, with some exceptions, tasks loaded on 4 underlying factors, partially supporting the underlying environmental model. LIMITATIONS:Limitations of this study included the uneven sample sizes in the 6 groups. CONCLUSIONS:Support for the environmental framework underlying the mDGI extends its usefulness as a clinical measure of functional mobility by providing a rationale for interpretation of scores that can be used to direct treatment and infer change in mobility function.
journal_name
Phys Therjournal_title
Physical therapyauthors
Shumway-Cook A,Matsuda PN,Taylor Cdoi
10.2522/ptj.20140047subject
Has Abstractpub_date
2015-06-01 00:00:00pages
864-70issue
6eissn
0031-9023issn
1538-6724pii
ptj.20140047journal_volume
95pub_type
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