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Journal of Head Trauma Rehabilitation:
doi: 10.1097/HTR.0b013e31826fe574
Original Articles

Psychometric Properties of the Multidimensional Assessment of Fatigue Scale in Traumatic Brain Injury: An NIDRR Traumatic Brain Injury Model Systems Study

Lequerica, Anthony PhD; Bushnik, Tamara PhD; Wright, Jerry MS, CBIST; Kolakowsky-Hayner, Stephanie A. PhD, CBIST; Hammond, Flora M. MD; Dijkers, Marcel P. PhD; Cantor, Joshua PhD

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Abstract

Objective: To investigate the psychometric properties of the Multidimensional Assessment of Fatigue (MAF) scale in a traumatic brain injury (TBI) sample.

Design: Prospective survey study.

Setting: Community.

Participants: One hundred sixty-seven individuals with TBI admitted for inpatient rehabilitation, enrolled into the TBI Model Systems national database, and followed up at either the first or second year postinjury.

Interventions: Not applicable.

Main Outcome Measure(s): Multidimensional Assessment of Fatigue.

Results: The initial analysis, using items 1 to 14, which are based on a 10-point rating scale, found that only 1 item (“walking”) misfit the overall construct of fatigue in this TBI population. However, this 10-point rating scale was found to have disordered thresholds. When ratings were collapsed into 4 response categories, all MAF items used to calculate the Global Fatigue Index formed a unidimensional scale.

Conclusion(s): Findings generally support the unidimensionality of the MAF when used in a TBI population but call into question the use of a 10-point rating scale for items 1 to 14. Further study is needed to investigate the use of a 4-category rating scale across all items and the fit of the “walking” item for a measure of fatigue among individuals with TBI.

© 2012 Lippincott Williams & Wilkins, Inc.

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