McCauley, Linda A, Joos, Sandra K, Barkhuizen, Andre et al. · Archives of environmental health · 2002 · DOI
Researchers studied Gulf War veterans to see how many had chronic fatigue that couldn't be explained by standard medical tests. They found that about 2.2% of veterans met the official criteria for ME/CFS, and another 5.1% had unexplained fatigue. Women veterans were more likely to have these conditions than men. Unlike some other ME/CFS patients, most of these veterans developed their fatigue gradually rather than suddenly.
This study provides clinical confirmation of ME/CFS in Gulf War veterans using standardized diagnostic criteria, moving beyond self-reported fatigue alone. It documents that ME/CFS affects a measurable proportion of this population and suggests environmental exposures or stressors during deployment may contribute to postdeployment illness, which has implications for understanding ME/CFS etiology.
This study does not establish causation between Gulf War service and ME/CFS development—it only documents prevalence in this population. The comparison of onset patterns (gradual vs. sudden) does not explain the biological mechanisms behind ME/CFS. It also does not prove that Gulf War-associated ME/CFS differs fundamentally from ME/CFS in the general population beyond symptom onset timing.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
McCauley, Linda A, Joos, Sandra K, Barkhuizen, Andre, Shuell, Tomas, Tyree, Wesley A, & Bourdette, Dennis N (2002). Chronic fatigue in a population-based study of Gulf War veterans.. Archives of environmental health. https://doi.org/10.1080/00039890209601419
BibTeX
@article{mecfsatlas-mccauley-2002-chronic-fatigue,
author = {McCauley, Linda A and Joos, Sandra K and Barkhuizen, Andre and Shuell, Tomas and Tyree, Wesley A and Bourdette, Dennis N},
title = {Chronic fatigue in a population-based study of Gulf War veterans.},
journal = {Archives of environmental health},
year = {2002},
doi = {10.1080/00039890209601419},
note = {PubMed: 12530602},
url = {https://www.mecfsatlas.com/evidence/mccauley-2002-chronic-fatigue},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/mccauley-2002-chronic-fatigue
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