E2 ModerateWeak / uncertainPEM not requiredCross-SectionalPeer-reviewedReviewed
Standard · 3 min
Personality and medical perception in benign myalgic encephalomyelitis.
May, P G, Donnan, S P, Ashton, J R et al. · Lancet (London, England) · 1980 · DOI
Quick Summary
This 1980 study looked at girls at a school where some developed ME/CFS-like illness during an outbreak. Researchers tested all the girls—both sick and healthy—and found that the sick girls tended to be more emotionally sensitive or anxious than the healthy ones. However, viruses weren't consistently found, and the study suggested that doctors may have sometimes labeled different conditions with the same name, making it harder to understand what was really happening.
Why It Matters
This study highlights two persistent challenges in ME/CFS research: the difficulty in finding definitive viral causes in outbreaks and the role of psychological and perceptual factors in how the illness is diagnosed and understood. Understanding whether personality differences are part of the disease process or reflect how the condition is recognized has remained central to ME/CFS research for decades.
Observed Findings
Younger girls with the condition showed higher neuroticism scores on psychological testing compared to unaffected peers
Virological testing was predominantly negative, with only limited evidence of viral infection in a few cases
Different underlying medical conditions appeared to receive identical diagnostic labels ('altered medical perception')
The outbreak occurred in a closed residential setting among school-aged girls
Conclusions from an international symposium on ME/CFS were not supported by this outbreak's findings
Inferred Conclusions
Psychological factors, particularly neuroticism in younger patients, may be associated with ME/CFS presentation during outbreaks
The lack of consistent virological findings challenges purely infectious explanations for outbreak cases
Diagnostic confusion and altered medical perception may contribute to case classification in ME/CFS outbreaks
The psychological profile and medical perception issues suggested environmental and contextual influences on illness manifestation
Remaining Questions
Does neuroticism precede illness onset or develop as a consequence of experiencing ME/CFS symptoms?
What This Study Does Not Prove
This study does not prove that personality traits cause ME/CFS or that the condition is primarily psychological in origin. The finding that affected girls showed higher neuroticism could reflect how psychological distress manifests with illness rather than causing it. The study's limitation to one school outbreak and its modest sample size restrict generalizability to broader ME/CFS populations.
Tags
Symptom:Fatigue
Phenotype:Infection-TriggeredPediatric
Method Flag:PEM Not DefinedWeak Case DefinitionExploratory OnlySmall Sample
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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