GAITRite

Overview

A literature search was conducted to identify all relevant publications on the psychometric properties of the GAITRite System. One study involving patients with stroke, and another involving healthy adults were identified and reviewed for the purposes of this module.

Floor/Ceiling Effects

No studies have investigated the floor or ceiling effects of the GAITRite System in patients with stroke.

Reliability

Internal constancy:
No studies have investigated the internal consistency of the GAITRite System in patients with stroke.

Test-retest:
Kuys, Brauer and Ada (2011) examined the test-retest reliability of the GAITRite System in measuring spatio-temporal parameters of gait (i.e gait speed, cadence, step length (paretic and non-paretic limb), step time (paretic and non-paretic limb), stance phase as a percentage of the gait cycle (paretic and non-paretic limb) in a group of 21 people following stroke undergoing inpatient rehabilitation. Participants were asked to walk the distance of the GAITRIte walkway two separate times within 48 hours, at a self-selected speed. Test-retest reliability was found to be excellent for all spatio-temporal parameters in the overall group (ICC=0.72-0.94), as calculated using Intraclass Correlation Coefficient. Patients were also categorized as ‘poor’ and ‘better’ ambulators, using the Motor Assessment Scale score (MAS) (poor: MAS Item 5 score 3 – 4, average gait speed = 0.54 m/s; better: MAS Item 5 score 5 – 6, average gait speed = 0.79 m/s). The test-retest reliability was found to be stronger for poorer ambulators compared to better ambulators (ICC ≥ 0.57 vs ICC ≥ 0.41). Results of this study indicate that test-retest reliability of the GAITRite System is slightly higher for individuals with more limited mobility.

Intra-rater:
No studies have investigated the intra-rater reliability of the GAITRIte System in patients with stroke.

Inter-rater:
No studies have investigated the inter-rater reliability of the GAITRite System in patients with stroke.

Validity

Content:
No studies have investigated the content validity of the GAITRIte System in patients with stroke.

Criterion:
Concurrent:
Bilney, Morris and Webster (2002) compared the concurrent validity of the GAITRite System with the Clinical Stride Analyzer (CSA) for quantification of the spatio-temporal gait parameters (gait speed, cadence, stride length, single leg support time – right and left, double limb support as a percentage of the gait cycle – right and left) in 25 healthy subjects. The CSA was selected as the criterion measure due to its wide clinical use in measuring spatiotemporal parameters of gait. Subjects were asked to walk the GAITRite walkway over three trials at three different speeds: self-selected speed, fast and slow speed. Excellent concurrent validity was found between the two measures for speed, cadence and stride length (ICC=0.99) at self-selected, slow and fast speeds, as calculated using Intraclass Correlation Coefficient (ICC). Concurrent validity for quantification of single leg stance phase was found to be moderate to excellent (ICC = 0.52-0.86 across the three gait speeds); and double limb support as a percentage of gait cycle was also found to have moderate to excellent concurrent validity (ICC = 0.44-0.57) between the two measures.

Predictive:
No studies have investigated the predictive validity of the GAITRIte System in patients with stroke.

Sensitivity/ Specificity:
No studies have investigated the sensitivity/specificity of the GAITRite System in patients with stroke.

Construct:
Convergent/Discriminant:
No studies have investigated the convergent or discriminant validity of the GAITRite System in patients with stroke.

Known Groups:
No studies have investigated the known groups validity of the GAITRite System in patients with stroke.

Responsiveness:
No studies have investigated the responsiveness of the GAITRite System in patients with stroke.

References
  • Bilney, B., Morris, M. & Webster, K. (2003). Concurrent related validity of the GAITRite walkway system for quantification of the spatial and temporal parameters of gait. Gait and Posture, 17, 68-74.
  • Kuys, S.S., Brauer, S.G. & Ada, L. (2011). Test-retest reliability of the GAITRite System in people with stroke undergoing rehabiliation. Disability and Rehabilitation, 33 (19-20), 1848. 1853.