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 |
| 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. |
