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Updated: Dec 10, 2025
Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
Published on: March 4, 2018
Reliability, internal consistency, and concurrent validity of a modified version of the dynamic gait index in people
Qianru Yu1, Benling Guan2, Jie Yu1
1Department of Otolaryngology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, 324 Jingwuweiqi Road, Jinan 250021, Shandong, China.
Background:
People with vestibular disorders often have abnormalities in gait and balance. The Dynamic Gait Index (DGI) is a relatively effective clinical gait measure that has been validated for use in patients with vestibular disorders. The modified version of the DGI (M-DGI) is based on the original DGI.
Research Question:
The objective of this study was to refine and test the clinical application of the M-DGI, and to investigate whether it is an effective indicator of dynamic gait in patients with vestibular disorders.
Methods:
A reliability and validity study. All raters reviewed the instructions and scoring criteria for each M-DGI item prior to the initial test. The raters simultaneously scored two M-DGI tasks for the 75 subjects, and the two tasks were completed with an interval of two hours in-between. Reliability of total M-DGI scores was assessed using intraclass correlation coefficients (2,1). Internal consistency of the M-DGI was evaluated using Cronbach's alpha. Concurrent validity of the M-DGI with Dizziness Handicap Inventory (DHI) and Timed "Up & Go" Test (TUG) was assessed using Spearman's rank order correlation coefficient.
Results And Significance:
Interrater and intrarater reliability of the total M-DGI scores were reflected by ICCs of 0.99 and 0.97. Internal consistency of the M-DGI score was 0.9975. Spearman's rank order correlation coefficient of the M-DGI score with the Dizziness Handicap Inventory (DHI) and the Timed "Up & Go" Test (TUG) was 0.72 and 0.65, respectively.The M-DGI demonstrates acceptable reliability, internal consistency, and concurrent validity for use as a clinical gait measurement for patients with vestibular disorders.
