Sleep Related Questionnaires

Fatigue Severity Scale (FSS)

Name of questionnaire Fatigue Severity Scale (FSS)
Type of questionnaire-description,age Measures fatigue severity in a variety of medical and neurologic disorders
Number of items 9 items
Domains/ categories Not applicable
Name of categories/domains   Not applicable
Scaling of items 7 point Likert scale
Scoring available: with permission or free Please contact developer
Scoring Test-retest reliability Yes
Scoring Internal consistency Yes , Cronbach’s Alpha: 0.88
Validity Yes, concurrent validity: correlation of FSS with visual analog scale was r  =0.68;  p< 0.001; vitality scores, were inversely correlated with Fatigue Severity Scores
Language English
Translations in other languages (if yes, then list the languages) German, Turkish, Norwegian
Developer name Lauren Krupp, MD
Developer contact information

 Lauren B. Krupp
Department of Neurology,
School of Medicine, Health Sciences Center,
State University of New York at StonyBrook
Stony Brook, NY 11794-8121.

E-mail: Lauren.krupp@sunysb.edu

Availability of questionnaire: needs permission from developer, cost or freely available Dr Krupp has the copyright. Commerical entities are charged for use of the FSS, otherwise clinicians and researcher supported by federal or non  for profit organizations can use it at no charge.
Limitations Original construct validity was tested with small numbers of subjects
Link to the questionnaire (if available) http://www.mainedo.com/pdfs/FSS.pdf 
Other comments Measures how fatigue affects motivation, exercise, physical functioning, carrying out duties, interfering with work, family, or social life.originally developed for multiple sclerosis andsystemic lupus erythematosus but also used for chronic fatigue syndrome; largely independent of self-reported depressive symptoms. Original study demonstrated that it helps to identify features that distinguish fatigue between two chronic medical disorders. Also described in fibromyalgia,  Lyme Borreliosis, post-polio, amyotrophic lateral sclerosis,   brain injury,  Parkinson’s disease, insomnia, sleep apnea. Patient-rated scale. 
References (original publication) Krupp LB, LaRocca NG, Muir-Nash J, Steinberg AD. The fatigue severity scale. Application to patients with multiple sclerosis and systemic lupus erythematosus. Arch Neurol. 1989 Oct;46(10):1121-3.