R 2 coefficients <0.13 were considered non-significant, between 0.13 and 0.26, moderately significant, and >0.26, of significant DIF impact. 23 Results Translation and cultural adaptation The process of translation, back-translation, and review of the back-translation did not show any difficulties.
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Cross-cultural adaptation and validation of the universal Portuguese-version of the Pediatric Functional Assessment of Chronic Illness Therapy - Fatigue (pedsFACIT-F).
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