Authors[edit | edit source]
Definition[edit | edit source]
- Having greater than or equal to 4 symptoms set forth in the 1994 Fukuda criteria.
- Severe fatigue as determined using the Multidimensional Fatigue Inventory (MFI): score of greater than or equal to 13 on the general fatigue subscale or greater than or equal to 10 on the reduced activity subscale.
- Functional impairment as determined using the Short-Form 36 (SF-36): score of less than or equal to 70 physical function subscale, or less than or equal to 50 on role physical subscale, or less than or equal to 75 on social function subscale, or less than or equal to 66.7 on emotional subscale.
- Symptom validity as determined using the Centers for Disease Control Symptom Inventory: score of greater than or equal to 25 on the Symptom Inventory Case Definition subscale.
Criticism[edit | edit source]
- There is no post-exertional malaise (PEM) required for diagnosis, which sets it apart from Canadian Consensus Criteria, International Consensus Criteria, and Systemic Exertion Intolerance Disease criteria (IOM Criteria).
- Letter by Tom Kindlon criticising the criteria, "Criteria used to define chronic fatigue syndrome questioned", that was published in Psychosomatic Medicine 
- One research study found 38% of those with a diagnosis of a Major depressive disorder were misclassified as having CFS using the empirical/Reeves definition.
Petition[edit | edit source]
Petition with over 2600 signatures (as of February 2016) against the criteria. 
Publications[edit | edit source]
- 2009, Evaluating the Centers for Disease Control's Empirical Chronic Fatigue Syndrome Case Definition(Full Text)
References[edit | edit source]
- Reeves, William C.; Wagner, Dieter; Nisenbaum, Rosane; Jones, James F.; Gurbaxani, Brian; Solomon, Laura; Papanicolaou, Dimitris A.; Unger, Elizabeth R.; Vernon, Suzanne D.; Heim, Christine (Dec 15, 2005). "Chronic Fatigue Syndrome – A clinically empirical approach to its definition and study". BMC Medicine. 3 (1): 19. doi:10.1186/1741-7015-3-19. ISSN 1741-7015. PMC . PMID 16356178.
- Jason, Leonard A.; Najar, Natasha; Porter, Nicole; Reh, Christy (Oct 21, 2008). "Evaluating the Centers for Disease Control's Empirical Chronic Fatigue Syndrome Case Definition". Journal of Disability Policy Studies. 20 (2): 93–100. doi:10.1177/1044207308325995. ISSN 1044-2073.
Post-exertional malaise (PEM) - A notable exacerbation of symptoms brought on by small physical or cognitive exertions. PEM can last for days or weeks. Symptoms can include cognitive impairments, muscle pain (myalgia), trouble remaining upright (orthostatic intolerance), sleep abnormalities, and gastro-intestinal impairments, among others.