Highlights
- •The Traumatic Brain Injury Caregiver Quality of Life (TBI-CareQOL) measurement system includes new and existing self-report measures.
- •Measures were developed specific to caring for someone with traumatic brain injury.
- •Generic measures also evaluate important quality of life constructs for caregivers.
Abstract
Objective
To develop a new measure of caregiver strain for use in caregivers of individuals
with traumatic brain injury (TBI), Traumatic Brain Injury Caregiver Quality of Life
(TBI-CareQOL) Caregiver Strain.
Design
Qualitative data, literature reviews, and cross-sectional survey study.
Setting
Three TBI Model Systems rehabilitation hospitals, an academic medical center, and
a military medical treatment facility.
Participants
Caregivers (N=560) of civilians (n=344) or service members/veterans (SMVs) with TBI
(n=216).
Interventions
Not applicable.
Main Outcome Measure
TBI-CareQOL Caregiver Strain Item Bank.
Results
Exploratory and confirmatory factor analyses, a graded response model (GRM) and differential
item functioning supported the retention of 33 items in the final measure. GRM calibration
data was used to inform the selection of a 6-item static short form, and to program
the TBI-CareQOL Caregiver Strain computer-adaptive test (CAT). CAT simulation analyses
indicated a 0.97 correlation between the CAT scores and the full item-bank. Three-week
test-retest reliability was strong (r=0.83).
Conclusions
The new TBI-CareQOL Caregiver Strain CAT and corresponding 6-item short form were
developed using established rigorous measurement development standards; this is the
first self-reported measure developed to evaluate caregiver strain in caregivers of
individuals with TBI.
Keywords
List of abbreviations:
CAT (computer adaptive test), CFA (confirmatory factor analysis), CFI (comparative fit index), DIF (differential item functioning), EFA (exploratory factor analysis), GRM (graded response model), HRQOL (health-related quality of life), IRT (item response theory), PRO (patient-reported outcome), PROMIS (Patient-Reported Outcomes Measurement Information System), RMSEA (root mean squared error of approximation), SF (short form), SMV (service member/veteran), TBI (traumatic brain injury), TBI-CareQOL (Traumatic Brain Injury Caregiver 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: July 02, 2018
Footnotes
Disclosures: none.
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