Solomon, Laura, Reeves, William C · Archives of internal medicine · 2004 · DOI
Researchers in Wichita, Kansas identified people with ME/CFS symptoms from the general population and found that only 16% had ever been diagnosed with the condition by a doctor. People were more likely to have received a diagnosis if they had moderate income, developed fatigue suddenly, or had tender lymph nodes and sore throat. This suggests that most people with ME/CFS in the community are never formally diagnosed.
This study reveals a critical diagnostic gap: most people with ME/CFS in the general population go unrecognized by healthcare providers. Understanding which factors increase the likelihood of diagnosis helps explain why many patients remain undiagnosed and highlights potential biases in who receives care, which could guide clinician education and improve case detection.
This study does not prove that certain symptoms (tender lymph nodes, sore throat, sudden onset) directly cause ME/CFS diagnosis or are more clinically important. The association between middle-income status and diagnosis may reflect differences in healthcare access or help-seeking behavior rather than true disease differences. This cross-sectional design cannot establish causation or temporal relationships.
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
Solomon, Laura & Reeves, William C (2004). Factors influencing the diagnosis of chronic fatigue syndrome.. Archives of internal medicine. https://doi.org/10.1001/archinte.164.20.2241
BibTeX
@article{mecfsatlas-solomon-2004-factors-influencing,
author = {Solomon, Laura and Reeves, William C},
title = {Factors influencing the diagnosis of chronic fatigue syndrome.},
journal = {Archives of internal medicine},
year = {2004},
doi = {10.1001/archinte.164.20.2241},
note = {PubMed: 15534161},
url = {https://www.mecfsatlas.com/evidence/solomon-2004-factors-influencing},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-28. https://www.mecfsatlas.com/evidence/solomon-2004-factors-influencing
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