Williams, Yolonda J, Jantke, Rachel L, Jason, Leonard A · New York State psychologist · 2014
This article explains why doctors have difficulty diagnosing ME/CFS and why patients often struggle to get proper care. The researchers found that there are disagreements about how to define and diagnose the illness, which makes it harder for healthcare providers to recognize it and treat it correctly. They call for better education of doctors and clearer diagnostic guidelines.
For ME/CFS patients, this work highlights a major barrier to diagnosis and treatment: doctors often disagree about what defines the illness. This study advocates for clearer diagnostic criteria, which could reduce the years many patients spend undiagnosed and improve access to appropriate care.
This review does not provide new experimental data, biomarkers, or treatment outcomes. It does not prove which specific case definition is superior, nor does it demonstrate treatment efficacy—it identifies the problem of inconsistent definitions rather than solving it directly.
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
Williams, Yolonda J, Jantke, Rachel L, & Jason, Leonard A (2014). Chronic Fatigue Syndrome: Case Definitions and Diagnostic Assessment.. New York State psychologist. https://pubmed.ncbi.nlm.nih.gov/27594717/
BibTeX
@article{mecfsatlas-williams-2014-chronic-fatigue,
author = {Williams, Yolonda J and Jantke, Rachel L and Jason, Leonard A},
title = {Chronic Fatigue Syndrome: Case Definitions and Diagnostic Assessment.},
journal = {New York State psychologist},
year = {2014},
note = {PubMed: 27594717},
url = {https://www.mecfsatlas.com/evidence/williams-2014-chronic-fatigue},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/williams-2014-chronic-fatigue
Contribute
Private, reviewed by a human. Not a public comment thread.