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Only a third of people with chronic fatigue have chronic fatigue syndrome

BMJ 2003; 327 doi: (Published 27 November 2003) Cite this as: BMJ 2003;327:0-h

Question How common is chronic fatigue syndrome among patients with chronic fatigue?

Synopsis In this cross sectional British study, patients aged 16 to 75 years with fatigue lasting more than six months were evaluated with the Centers for Disease Control's 1994 case definition for chronic fatigue syndrome (CFS). The criteria require patients to have severe chronic fatigue of six months or longer, with other known medical conditions excluded by clinical diagnosis, and concurrently …

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