{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T23:20:42Z","timestamp":1790551242854,"version":"4.1.0"},"reference-count":11,"publisher":"Oxford University Press (OUP)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015,6,1]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>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.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>The aim of this study was to examine the person-environmental model underlying the development and interpretation of mDGI scores.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>This was a cross-sectional, descriptive study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>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.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Factor analysis showed that, with some exceptions, tasks loaded on 4 underlying factors, partially supporting the underlying environmental model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Limitations<\/jats:title><jats:p>Limitations of this study included the uneven sample sizes in the 6 groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>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.<\/jats:p><\/jats:sec>","DOI":"10.2522\/ptj.20140047","type":"journal-article","created":{"date-parts":[[2014,12,19]],"date-time":"2014-12-19T10:33:57Z","timestamp":1418985237000},"page":"864-870","source":"Crossref","is-referenced-by-count":24,"title":["Investigating the Validity of the Environmental Framework Underlying the Original and Modified Dynamic Gait Index"],"prefix":"10.1093","volume":"95","author":[{"given":"Anne","family":"Shumway-Cook","sequence":"first","affiliation":[{"name":"A. Shumway-Cook, PT, PhD, FAPTA, Department of Rehabilitation Medicine, Division of Physical Therapy, University of Washington, 1959 NE Pacific St, Box 356490, Seattle, WA 98195 (USA)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patricia Noritake","family":"Matsuda","sequence":"additional","affiliation":[{"name":"P.N. Matsuda, PT, PhD, DPT, Department of Rehabilitation Medicine, Division of Physical Therapy, University of Washington."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Catherine","family":"Taylor","sequence":"additional","affiliation":[{"name":"C. 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