Article

OBJECTIVE: To evaluate the validity of the Modified Fatigue Impact Scale (MFIS)
in veterans with a history of mild to moderate traumatic brain injury (TBI).
PARTICIPANTS: Veterans (N = 106) with mild (92%) or moderate (8%) TBI. SETTING:
Veterans Administration Health System. PROCEDURE: Factor structure, internal
consistency, convergent validity, sensitivity, and specificity of the MFIS were
examined. RESULTS: Principal component analysis identified 2 viable MFIS factors:
a Cognitive subscale and a Physical/Activities subscale. Item analysis revealed
high internal consistency of the MFIS Total scale and subscale items. Strong
convergent validity of the MFIS scales was established with 2 Beck Depression
Inventory II fatigue items. Receiver operating characteristic curve analysis
revealed good to excellent accuracy of the MFIS in classifying fatigued versus
nonfatigued individuals. CONCLUSION: The MFIS is a valid multidimensional measure
that can be used to evaluate the impact of fatigue on cognitive and physical
functioning in individuals with mild to moderate TBI. The psychometric properties
of the MFIS make it useful for evaluating fatigue and provide the potential for
improving research on fatigue in this population.

Langue : ANGLAIS