OBJECTIVE: The Fatigue Impact Scale for Daily Use (D-FIS) is an eight-item instrument designed to measure subjective daily experience of fatigue. This study sought to determine the metric properties of the D-FIS in multiple sclerosis (MS) patients. METHODS: Sixty-eight patients with operationally-defined MS and fatigue (54.8% of the sample) underwent the D-FIS. Usual clinical measures for MS, the Montgomery-Asberg Depression Rating Scale (MADRS) and the Functional Assessment of Multiple Sclerosis (FAMS) were also applied. In addition, patients with fatigue completed the Fatigue Descriptive Scale, the Multidimensional Fatigue Inventory (MFI), a Visual Analogue Scale for Fatigue (VAS-F), and a Global Perception of Fatigue Scale (GPF). RESULTS: Full computable data, 95.6%; both floor and ceiling effect=1.54%; item-total correlation=0.62 (item 1) to 0.84 (item 6); Cronbach's alpha=0.91; item homogeneity =0.55; standard error of measurement=3.18; convergent validity with other fatigue measures=-0.57 (VAS-F); 0.52 (GPF); and 0.46 (MFI-general fatigue). Test-retest reliability (ICC)=0.81. There was a strong association between health-related quality of life (HRQoL) (FAMS) and D-FIS (rS=0.70). CONCLUSIONS: In this study, D-FIS proved to be a feasible and valid instrument for measuring MSrelated fatigue, a frequent symptom associated with deterioration of patients' HRQoL.
OBJECTIVE: The Fatigue Impact Scale for Daily Use (D-FIS) is an eight-item instrument designed to measure subjective daily experience of fatigue. This study sought to determine the metric properties of the D-FIS in multiple sclerosis (MS) patients. METHODS: Sixty-eight patients with operationally-defined MS and fatigue (54.8% of the sample) underwent the D-FIS. Usual clinical measures for MS, the Montgomery-Asberg Depression Rating Scale (MADRS) and the Functional Assessment of Multiple Sclerosis (FAMS) were also applied. In addition, patients with fatigue completed the Fatigue Descriptive Scale, the Multidimensional Fatigue Inventory (MFI), a Visual Analogue Scale for Fatigue (VAS-F), and a Global Perception of Fatigue Scale (GPF). RESULTS: Full computable data, 95.6%; both floor and ceiling effect=1.54%; item-total correlation=0.62 (item 1) to 0.84 (item 6); Cronbach's alpha=0.91; item homogeneity =0.55; standard error of measurement=3.18; convergent validity with other fatigue measures=-0.57 (VAS-F); 0.52 (GPF); and 0.46 (MFI-general fatigue). Test-retest reliability (ICC)=0.81. There was a strong association between health-related quality of life (HRQoL) (FAMS) and D-FIS (rS=0.70). CONCLUSIONS: In this study, D-FIS proved to be a feasible and valid instrument for measuring MSrelated fatigue, a frequent symptom associated with deterioration of patients' HRQoL.
Authors: Regina Rendas-Baum; Min Yang; Francoise Cattelin; Gene V Wallenstein; John D Fisk Journal: Qual Life Res Date: 2010-07-10 Impact factor: 4.147
Authors: Kirsten M Fiest; John D Fisk; Scott B Patten; Helen Tremlett; Christina Wolfson; Sharon Warren; Kyla A McKay; Lindsay I Berrigan; Ruth Ann Marrie Journal: Int J MS Care Date: 2016 Mar-Apr
Authors: Ruth Ann Marrie; Scott B Patten; Lindsay I Berrigan; Helen Tremlett; Christina Wolfson; Sharon Warren; Stella Leung; Kirsten M Fiest; Kyla A McKay; John D Fisk Journal: Int J MS Care Date: 2018 Mar-Apr
Authors: Roy G Elbers; Marc B Rietberg; Erwin E H van Wegen; John Verhoef; Sharon F Kramer; Caroline B Terwee; Gert Kwakkel Journal: Qual Life Res Date: 2011-10-20 Impact factor: 4.147
Authors: Ruth Ann Marrie; Lesley Graff; John R Walker; John D Fisk; Scott B Patten; Carol A Hitchon; Lisa M Lix; James Bolton; Jitender Sareen; Alan Katz; Lindsay I Berrigan; James J Marriott; Alexander Singer; Renée El-Gabalawy; Christine A Peschken; Ryan Zarychanski; Charles N Bernstein Journal: JMIR Res Protoc Date: 2018-01-17