Lage AC1, Bomtempo AP1, Furtado Araújo A1, Czuber-Dochan W2, Rosa Cardoso J3, Chebli J1, Malaguti C1
1Federal University of Juiz de Fora, Juiz de Fora, Brazil, 2King's College London, London, Brazil, 3Universidade Estadual de Londrina, Londrina, Brazil
Background: Fatigue is a common condition in patients with IBD. Therefore, translated, culturally adapted, and clinimetrically tested instruments for measuring IBD-F are needed.
Purpose: To cross-culturally adapt the Inflammatory Bowel Disease- Fatigue (IBD-F) into Brazilian Portuguese. This study also aimed to test the measurement properties of the IBD-F in a group of patients with inflammatory bowel disease (IBD).
Methods: The IBD-F instruments were cross-culturally adapted into Brazilian Portuguese. The measurement properties of the IBD-F (internal consistency, ceiling and floor effects, and construct validity) were tested in 118 patients with IBD. The reproducibility and responsiveness were tested in patients with IBD in a test-retest design, with follow-up testing at 48 to 72 hours and at 8-12 weeks after baseline.
Results: The IBD-F yielded adequate internal consistency (Cronbach alpha was 0.98) and excellent reliability (intraclass correlation coefficient [model 2,1] was 0.97). The IBD-F standard error of measurement was 4.8 and minimal detectable change was 6.0. The highest correlations were observed between the IBD-F and FACIT-F (Spearman rho> -0.67, P.05). No ceiling effect was observed, but some floor effect of 25% was observed for any of the instruments. Effect sizes used for measuring internal responsiveness ranged from low to moderate measures. The IBD-F showed highest external responsiveness with área under cover of 0.95.
Conclusion(s): The Brazilian Portuguese versions of the IBD-F have acceptable measurement properties.
Implications: In addition to providing a Brazilian Portuguese version of the instrument to be used for clinicians, this study adds evidence supporting the measurement properties of this instrument for assessing patients with IBD.
Keywords: Fatigue, Inflammatory Bowel Disease, measurement properties, questionnaires
Funding acknowledgements: CAPES, CNPq and Fapemig
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001
Purpose: To cross-culturally adapt the Inflammatory Bowel Disease- Fatigue (IBD-F) into Brazilian Portuguese. This study also aimed to test the measurement properties of the IBD-F in a group of patients with inflammatory bowel disease (IBD).
Methods: The IBD-F instruments were cross-culturally adapted into Brazilian Portuguese. The measurement properties of the IBD-F (internal consistency, ceiling and floor effects, and construct validity) were tested in 118 patients with IBD. The reproducibility and responsiveness were tested in patients with IBD in a test-retest design, with follow-up testing at 48 to 72 hours and at 8-12 weeks after baseline.
Results: The IBD-F yielded adequate internal consistency (Cronbach alpha was 0.98) and excellent reliability (intraclass correlation coefficient [model 2,1] was 0.97). The IBD-F standard error of measurement was 4.8 and minimal detectable change was 6.0. The highest correlations were observed between the IBD-F and FACIT-F (Spearman rho> -0.67, P.05). No ceiling effect was observed, but some floor effect of 25% was observed for any of the instruments. Effect sizes used for measuring internal responsiveness ranged from low to moderate measures. The IBD-F showed highest external responsiveness with área under cover of 0.95.
Conclusion(s): The Brazilian Portuguese versions of the IBD-F have acceptable measurement properties.
Implications: In addition to providing a Brazilian Portuguese version of the instrument to be used for clinicians, this study adds evidence supporting the measurement properties of this instrument for assessing patients with IBD.
Keywords: Fatigue, Inflammatory Bowel Disease, measurement properties, questionnaires
Funding acknowledgements: CAPES, CNPq and Fapemig
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001
Topic: Outcome measurement
Ethics approval required: Yes
Institution: Federal University of Juiz de Fora
Ethics committee: Comitê de ética da UFJF
Ethics number: 2372106
All authors, affiliations and abstracts have been published as submitted.
