Euba, R, Chalder, T, Deale, A et al. · The British journal of psychiatry : the journal of mental science · 1996 · DOI
This study compared ME/CFS patients seen in general doctor's offices with those referred to a specialist clinic. Patients at the specialist clinic had more severe fatigue and physical symptoms, and were more functionally disabled, but were often wealthier and more likely to believe their illness had a physical cause. Interestingly, nearly half of those referred to the specialist clinic didn't actually meet the official criteria for ME/CFS.
This research is important because it questions whether the characteristics seen in ME/CFS specialist clinics truly reflect the disease itself or are artifacts of who gets referred and seeks specialized care. Understanding these selection biases helps researchers and clinicians recognize which features are core to ME/CFS versus which may result from patient demographics or healthcare-seeking behavior.
This study does not prove that ME/CFS is primarily psychological in nature, nor does it establish causal relationships between selection bias and clinical presentation. It also does not fully explain why nearly half of specialist referrals fail to meet diagnostic criteria—this could reflect diagnostic uncertainty, evolution of criteria, or genuine clinical heterogeneity rather than definitively establishing selection bias.
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
Euba, R, Chalder, T, Deale, A, & Wessely, S (1996). A comparison of the characteristics of chronic fatigue syndrome in primary and tertiary care.. The British journal of psychiatry : the journal of mental science. https://doi.org/10.1192/bjp.168.1.121
BibTeX
@article{mecfsatlas-euba-1996-comparison-characteristics,
author = {Euba, R and Chalder, T and Deale, A and Wessely, S},
title = {A comparison of the characteristics of chronic fatigue syndrome in primary and tertiary care.},
journal = {The British journal of psychiatry : the journal of mental science},
year = {1996},
doi = {10.1192/bjp.168.1.121},
note = {PubMed: 8770441},
url = {https://www.mecfsatlas.com/evidence/euba-1996-comparison-characteristics},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/euba-1996-comparison-characteristics
Contribute
Private, reviewed by a human. Not a public comment thread.