Highlights
- •The Arabic Modified Fatigue Impact scale (A-MFIS) has two factors cognitive and physical.
- •The A-MFIS has high concurrent validity with measures of disease severity and quality of life.
- •The A-MFIS subscale and total scores have high test-retest reliability.
Abstract
Background
Fatigue is a common symptom in multiple sclerosis and has significant impacts on participation
and quality of life. Thus, fatigue assessment in this population is always a necessity.
Objectives
to examine the underlying structure, validity and test-retest reliability of an Arabic
translated and culturally adapted version of the Modified Fatigue Impact scale (A-MFIS).
Methods
The study was carried out into two phases: firstly, the English version of the MFIS
was translated into Arabic and secondly, a detailed analysis of the psychometric properties
and the structure of the translated version was conducted using Principle Component
Analysis (PCA). Convergent validity was assessed by comparison with measures of disease
severity, quality of life and with another measure of fatigue. Test retest reliability
was assessed with intra-class correlations.
Results
145 subjects participated in the study. The PCA revealed that the instrument has two
main factors “cognitive” and “physical”, rather than the original three factors scale.
Significant correlations were found between the A-MFIS and measures of disease severity
and quality of life (P<0.05). Furthermore, the A-MFIS subscale and total scores have good to high test-retest
reliability.
Conclusion
The A-MFIS has high reliability and concurrent validity with other measures of disease
severity and quality of life.
Keywords
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Article info
Publication history
Published online: November 29, 2019
Accepted:
November 28,
2019
Received in revised form:
November 11,
2019
Received:
February 26,
2019
Identification
Copyright
© 2019 Elsevier B.V. All rights reserved.
