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Test-Retest Reliability of Traumatic Brain Injury Outcome Measures: A Traumatic Brain Injury Model Systems Study
Jennifer A Bogner1, Gale G Whiteneck, Jessica MacDonald
1Department of Physical Medicine and Rehabilitation, The Ohio State University, Columbus (Drs Bogner, MacDonald, and Corrigan); Craig Hospital Research Department, Englewood, Colorado (Dr Whiteneck, Ms Philippus, and Mr Mellick); Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, Pennsylvania (Drs Juengst and Arenth); Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota (Dr Brown); Kessler Foundation, East Hanover, New Jersey (Dr Lengenfelder); and Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond (Ms Marwitz).
Objective:
Evaluate the test-retest reliability of measures that comprise the Traumatic Brain Injury Model Systems follow-up data set.
Participants:
A total of 224 persons with a moderate-severe traumatic brain injury (TBI) enrolled in the Traumatic Brain Injury Model Systems National Database.
Design:
Following standard administration of the follow-up interview, a second interview was administered 14 to 28 days later using the same interviewer and the same mode of administration.
Main Measures:
Traumatic Brain Injury Model Systems follow-up interview that includes 66 variables comprised (a) single item measures of demographics; employment; general health as well as specific health conditions; rehospitalization; tobacco, alcohol, and other drug use; transportation; and mental health and (b) multi-item instruments: FIM; Participation Assessment With Recombined Tools-Objective; Disability Rating Scale; Glasgow Outcome Scale-Extended; Supervision Rating Scale; Satisfaction With Life Scale; TBI Quality of Life Anxiety and Depression items; and The Ohio State University TBI Identification Method.
Results:
Intraclass correlation coefficient values ranged from 0.65 to 0.99, weighted kappa values ranged from 0.54 to 0.99, and kappa values ranged from 0.43 to 1.00. Four kappa/weighted kappa estimates fell below 0.60: arrested, psychiatric hospitalization, number of days not in good physical health, and rating of general emotional health.
Conclusions:
With few exceptions, good to excellent test-retest reliability estimates were obtained. The findings support the use of these measures in prior and future studies and indicate that persons with moderate-severe TBI can provide reliable self-report.
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