Abstract
BackgroundThe purpose of this study was to determine the test-retest reliability of temporal and spatial gait measurements over a one-week period as measured using an instrumented walkway system (GAITRite®).MethodsSubjects were tested on two occasions one week apart. Measurements were made at preferred and fast walking speeds using the GAITRite® system. Measurements tested included walking speed, step length, stride length, base of support, step time, stride time, swing time, stance time, single and double support times, and toe in-toe out angle.ResultsTwenty-one healthy subjects participated in this study. The group consisted of 12 men and 9 women, with an average age of 34 years (range: 19 – 59 years). At preferred walking speed, all gait measurements had ICC's of 0.92 and higher, except base of support which had an ICC of 0.80. At fast walking speed all gait measurements had ICC's above 0.89 except base of support (ICC = 0.79),ConclusionsSpatial-temporal gait measurements demonstrate good to excellent test-retest reliability over a one-week time span.
Highlights
The purpose of this study was to determine the test-retest reliability of temporal and spatial gait measurements over a one-week period as measured using an instrumented walkway system (GAITRite®)
Test-retest reliability at preferred walking speed At preferred walking speed, intraclass correlation coefficients (ICC)'s for all gait measurements tested were 0.92 and higher, with the exception of base of support, which had an ICC of 0.80
ICC's for all other gait measurements were 0.91 and higher
Summary
The purpose of this study was to determine the test-retest reliability of temporal and spatial gait measurements over a one-week period as measured using an instrumented walkway system (GAITRite®). Objective assessments can supply the clinician with highly reliable and valid data, but are usually time consuming, expensive, and they demand specific expertise. Instrumented walkways, can supply the clinician with quick objective measurements of a patient's gait. Such instrumentation is becoming more common in the clinical environment, and quantitative measures of gait are being used as outcome measures to evaluate treatment efficacy and function [2]. When using an objective gait assessment for the evaluation of an intervention it is necessary to know if the detected changes are genuine (that is, caused by the treatment) or if they are caused by the instrumentation system's measurement errors or normal variation of a person's gait. It is of great importance to have insight into both reliability and validity of the instrument being used,
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