Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/24541

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Title
The high-level mobility assessment tool (HiMAT) for traumatic brain injury. Part 2: content validity and discriminability
Author/Creator
Williams, G. P.;  Robertson, Val;  Greenwood, K. M.;  Goldie, P. A.;  Morris, M. E.
Description
Primary objectives: (i) To assess the measurement properties of the high-level mobility assessment tool (HiMAT) for people with traumatic brain injury (TBI), (ii) to measure the extent to which the HiMAT is a uni-dimensional, discriminative hierarchical outcome scale. Research design: The content validity was assessed using a three-stage process of investigating internal consistency, factor analysis and Rasch analysis. The uni-dimensionality of the HiMAT items was also tested. Discriminability was investigated by correlating raw and logit scores obtained from Rasch analysis. The study was conducted at a major rehabilitation facility using a convenience sample of 103 adults with TBI. Main outcomes and results: The internal consistency for the high-level items was very high (Cronbach's alpha = 0.99). Principal axis factoring identified several balance items as belonging to a second factor not related to high-level mobility, hence these items were excluded. Rasch analysis identified several misfitting items, such as walking around a figure of eight and stopping from a run, which were also excluded. Logit scores were used to exclude clustered and, therefore, redundant items. Raw scores correlated very highly (r = 0.98) with logit scores, indicating that raw scores provided good discriminability and were suitable for use by clinicians. Conclusion: The HiMAT, which assesses higher-level mobility requirements of people with TBI for return to pre-accident social, leisure and sporting activities, is a uni-dimensional and discriminative scale for quantifying therapy outcomes.
Relation
Brain Injury Vol. 19, no. 10, p. 833-843
Date
2005
Publisher
Taylor & Francis
Keyword(s)
brain injuries;  rehabilitation;  gait disorders;  neurologic;  outcome;  assessment;  functional mobility;  obstacle course;  rasch analysis;  older adults;  stroke;  balance;  motor;  stability;  outcomes;  profile
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/24541
Identifier
ISSN:0269-9052
Language
eng
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Subject
"Brain Injury"
 
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