Vol. 55 No. 1 © Society of Occupational Medicine 2005; all rights reserved
In-depth Review |
A systematic review describing the prognosis of chronic fatigue syndrome
Department of Psychological Medicine, Institute of Psychiatry, London, UK
Aim To perform a systematic review of studies describing the prognosis of chronic fatigue (CF) and chronic fatigue syndrome (CFS) and to identify occupational outcomes from such studies.
Method A literature search was used to identify all studies describing the clinical follow-up of patients following a diagnosis of CF or CFS. The prognosis is described in terms of the proportion of individuals improved during the period of follow-up. Return to work, other medical illnesses and death as outcomes are also considered, as are variables which may influence prognosis.
Results Twenty-eight articles met the inclusion criteria and, for the 14 studies of subjects meeting operational criteria for CFS, the median full recovery rate was 5% (range 0–31%) and the median proportion of patients who improved during follow-up was 39.5% (range 8–63%). Less fatigue severity at baseline, a sense of control over symptoms and not attributing illness to a physical cause were all associated with a good outcome. Return to work at follow-up ranged from 8 to 30% in the three studies that considered this outcome.
Conclusions Full recovery from untreated CFS is rare. The prognosis for an improvement in symptoms is less gloomy. This review looks at the course of CF/CFS without systematic intervention. However, there is increasing evidence for the effectiveness of cognitive behavioural and graded exercise therapies. Medical retirement should be postponed until a trial of such treatment has been given.
Keywords Chronic fatigue syndrome (CFS); outcomes; prognosis
Correspondence to: Professor M. Hotopf, Academic Department of Psychological Medicine, Institute of Psychiatry and GKT School of Medicine, Weston Education Centre, 10 Cutcombe Road, London SE5 9RJ, UK.Email: m.hotopf{at}iop.kcl.ac.uk
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