Abstract
Objective
To determine the factor structure of the Traumatic Brain Injury–Quality of Life (TBI-QOL)
measurement system.
Design
Observational.
Setting
3 TBI Model Systems rehabilitation centers.
Participants
Twenty TBI-QOL item banks were administered to a sample of community-dwelling adults
with TBI (N=504) as part of a study of TBI classification. A subsample of participants
(n=200) was randomly selected for exploratory factor analyses, while data from the
remaining participants (n=304) were used for the confirmatory factor analysis. To
examine a wide range of conceptual models, confirmatory factor analyses were conducted
on a total of 16 models, ranging from 1 to 7 factors.
Interventions
Not applicable.
Main Outcome Measures
Not applicable.
Results
Initial exploratory factor analysis yielded support for a 5-factor model (negative
emotion, cognitive impairment, functioning and participation, positive emotion, pain).
Confirmatory factor analysis results, however, indicated a 7-factor model including
physical function, physical symptoms, cognition, negative emotion, positive emotion,
sense of self, and social participation (model 16; robust fit statistics root mean
square error of approximation =.063, standardized root mean square residual =.035,
comparative fit index =.955, Tucker-Lewis Index =.943, Bayes Information Criterion
=40059.44).
Conclusions
The complex 7-factor model of the TBI-QOL provides a more nuanced framework for understanding
health-related quality of life for persons with TBI than the commonly used 3-factor
model including physical health, mental health, and social health.
Keywords
List of abbreviations:
CFI (comparative fit index), HRQOL (health-related quality of life), Neuro-QOL (Quality of Life in Neurological Disorders), PROMIS (Patient-Reported Outcomes Measurement Information System), RMSEA (root mean square error of approximation), SRMR (standardized root mean square residual), TBI (traumatic brain injury), TBI-QOL (Traumatic Brain Injury Quality of Life), TLI (Tucker-Lewis Index)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: May 17, 2017
Footnotes
Supported by the U.S. Department of Health and Human Services–Administration for Community Living, National Institute on Disability, Independent Living, and Rehabilitation Research (grant nos. 90RT5007, 90DP0028).
Disclosures: none.
Identification
Copyright
© 2016 by the American Congress of Rehabilitation Medicine
