Investigating the validity of the environmental framework underlying the original and modified Dynamic Gait Index.

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 Ther

journal_title

Physical therapy

authors

Shumway-Cook A,Matsuda PN,Taylor C

doi

10.2522/ptj.20140047

subject

Has Abstract

pub_date

2015-06-01 00:00:00

pages

864-70

issue

6

eissn

0031-9023

issn

1538-6724

pii

ptj.20140047

journal_volume

95

pub_type

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