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Chronobiol Int. 2001 Mar;18(2):315-9.

A community-based study of seasonal variation in the onset of chronic fatigue syndrome and idiopathic chronic fatigue.

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1
DePaul University, Department of Psychology, Chicago, IL 60614, USA. ljason@wppost.depaul.edu

Abstract

One proposed hypothesis regarding the etiology of chronic fatigue syndrome (CFS) is that there is a subgroup of patients in which symptom onset is precipitated by a viral infection. If this is indeed true, then one would anticipate a greater incidence of the emergence of CFS symptoms during months when viral infections occur with the greatest frequency. The current community-based epidemiology study examined the month of symptom onset for 31 patients with CFS and 44 others with idiopathic chronic fatigue (ICF). It was determined that the distribution of the month of illness onset for the CFS and ICF groups was nonrandom, with greater numbers of participants than expected reporting an onset of CFS and ICF during January.

PMID:
11379670
[Indexed for MEDLINE]
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