Warren, John W, Clauw, Daniel J · Psychosomatic medicine · 2012 · DOI
This study found that when doctors ask patients "Have you been diagnosed with ME/CFS or fibromyalgia?" they miss many people who actually have these conditions based on their symptoms. For example, doctors missed 90% of people who truly had ME/CFS by symptom criteria, and 77% of those with fibromyalgia. The researchers showed that asking about symptoms directly, rather than relying on patients to report a doctor's diagnosis, is much more accurate for identifying these conditions.
This study highlights a critical methodological problem in ME/CFS research: many prevalence, incidence, and comorbidity studies have likely severely underestimated disease frequency by relying on self-reported diagnoses rather than symptom-based definitions. For ME/CFS patients specifically, the 90% miss rate suggests the true burden of disease in the population is far higher than surveys based on reported diagnoses would indicate, underscoring the need for better case identification and physician awareness.
This study does not establish why physicians fail to diagnose these syndromes—whether due to lack of awareness, diagnostic uncertainty, or patient factors. It also does not assess the quality or consistency of physician diagnostic practices across different clinical settings, nor does it determine whether self-reported diagnoses that were made are actually accurate.
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
Warren, John W & Clauw, Daniel J (2012). Functional somatic syndromes: sensitivities and specificities of self-reports of physician diagnosis.. Psychosomatic medicine. https://doi.org/10.1097/PSY.0b013e31827264aa
BibTeX
@article{mecfsatlas-warren-2012-functional-somatic,
author = {Warren, John W and Clauw, Daniel J},
title = {Functional somatic syndromes: sensitivities and specificities of self-reports of physician diagnosis.},
journal = {Psychosomatic medicine},
year = {2012},
doi = {10.1097/PSY.0b013e31827264aa},
note = {PubMed: 23071343},
url = {https://www.mecfsatlas.com/evidence/warren-2012-functional-somatic},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/warren-2012-functional-somatic
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