Eisen, Seth A, Kang, Han K, Murphy, Frances M et al. · Annals of internal medicine · 2005 · DOI
This study looked at over 2,000 U.S. veterans from the 1991 Gulf War, comparing those who were deployed to the Persian Gulf with those who were not. Researchers found that deployed veterans had higher rates of chronic fatigue syndrome, fibromyalgia, skin problems, and stomach issues 10 years after the war. Overall physical health scores were similar between the two groups, but the increased risk of these specific conditions in deployed veterans suggests Gulf War deployment may have lasting health effects.
This study provides epidemiological evidence that Gulf War deployment is associated with a dramatically increased risk of chronic fatigue syndrome (40-fold higher prevalence), validating concerns about post-deployment health sequelae. The findings support the biological plausibility of deployment-related ME/CFS and strengthen the case that environmental or infectious exposures during military service may trigger these conditions in susceptible individuals.
This study does not establish causation—only association between deployment and illness. The cross-sectional design captures a single time point and cannot determine whether deployment directly caused these conditions or whether selection bias (who participated in the study) affected results. Additionally, the study could not detect illnesses that resolved before the examination, potentially underestimating the true burden of acute post-deployment illness.
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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