Gray, Gregory C, Reed, Robert J, Kaiser, Kevin S et al. · American journal of epidemiology · 2002 · DOI
This study surveyed nearly 12,000 Navy Seabees who served around the time of the 1991 Gulf War to understand their health problems. Compared to Seabees who didn't deploy to the Gulf, those who did reported significantly more health issues, including chronic fatigue syndrome, PTSD, chemical sensitivity, and irritable bowel syndrome. Women, reserve members, and certain military units had higher rates of these combined symptoms.
This large epidemiological study demonstrates that chronic fatigue syndrome was significantly more prevalent in Gulf War veterans than in non-deployed controls, establishing ME/CFS as a measurable clinical entity within Gulf War illness. The finding that 22% of deployed Seabees met criteria for multisymptom illness including CFS underscores the scale and importance of post-deployment fatigue disorders, which shares features relevant to ME/CFS research more broadly.
This study cannot identify the specific cause of Gulf War illness or establish that any particular exposure directly caused CFS, as it is cross-sectional and relies entirely on self-reported exposures and symptoms without clinical confirmation. The association between exposures and illness does not prove causation, and the study design cannot determine whether reported exposures actually preceded symptom onset. Without a concurrent non-deployed control group examined clinically, the true prevalence of CFS cannot be definitively calculated.
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 →
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