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The Unidimensional Fatigue Impact Scale (U-FIS) is a disease specific patient-reported outcome measure which measures the impact of multiple sclerosis related fatigue[1]. It is a 22 item unidimensional scale which is based on needs-based quality of life theory[2].

Background

The U-FIS was developed by Galen Research and published in 2009[3]. It was derived from the Fatigue Impact Scale, a scale identified by the Multiple Sclerosis Council for Clinical Practice Guidelines “as the most appropriate for assessing the impact of MS-related fatigue on quality of life.”[4].

Data from the FIS went through Rasch analysis and additional items were added from interviews with multiple sclerosis patients. The U-FIS was then tested for validity via patient interviews and a validation survey[5].

International Use

The U-FIS has been translated and validated into eight different language versions: Canadian English, Canadian French, German, Swedish, Italian, French, US English and Spanish[6].

It has been recommended for use in determining fatigue impact by an independent meta analysis[7] and has also been utilized in a study investigating the role of neuroticism, perfectionism and depression in chronic fatigue syndrome[8].

References

  1. ^ Meads, DM (2009 Oct). "The development and validation of the Unidimensional Fatigue Impact Scale (U-FIS)". Multiple sclerosis (Houndmills, Basingstoke, England). 15 (10): 1228–38. PMID 19556314. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  2. ^ Meads, DM (2009 Oct). "The development and validation of the Unidimensional Fatigue Impact Scale (U-FIS)". Multiple sclerosis (Houndmills, Basingstoke, England). 15 (10): 1228–38. PMID 19556314. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  3. ^ Meads, DM (2009 Oct). "The development and validation of the Unidimensional Fatigue Impact Scale (U-FIS)". Multiple sclerosis (Houndmills, Basingstoke, England). 15 (10): 1228–38. PMID 19556314. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  4. ^ Mathiowetz, V (2003 Jul-Aug). "Test-retest reliability and convergent validity of the Fatigue Impact Scale for persons with multiple sclerosis". The American journal of occupational therapy : official publication of the American Occupational Therapy Association. 57 (4): 389–95. PMID 12911080. {{cite journal}}: Check date values in: |date= (help)
  5. ^ Meads, DM (2009 Oct). "The development and validation of the Unidimensional Fatigue Impact Scale (U-FIS)". Multiple sclerosis (Houndmills, Basingstoke, England). 15 (10): 1228–38. PMID 19556314. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  6. ^ Doward, Lynda C. (2010). "International Development of the Unidimensional Fatigue Impact Scale (U-FIS)". Value in Health. 13 (4). doi:10.1111/j.1524-4733.2010.00706.x. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  7. ^ Elbers, RG (2012 Aug). "Self-report fatigue questionnaires in multiple sclerosis, Parkinson's disease and stroke: a systematic review of measurement properties". Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation. 21 (6): 925–44. PMID 22012025. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  8. ^ Valero, S (2013 Oct). "The role of neuroticism, perfectionism and depression in chronic fatigue syndrome. A structural equation modeling approach". Comprehensive psychiatry. 54 (7): 1061–7. PMID 23759150. {{cite journal}}: Check date values in: |date= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)