Jason, Leonard A, Kot, Bobby, Sunnquist, Madison et al. · Fatigue : biomedicine, health & behavior · 2014 · DOI
Researchers compared different sets of diagnostic criteria used to identify ME/CFS patients. They looked at criteria developed by expert groups (like the Canadian Consensus Criteria) and compared them to criteria identified through statistical analysis of actual patient data. The study found that the fatigue and post-exertional malaise domain (worsening symptoms after activity) was the best feature for distinguishing ME/CFS patients from healthy people, and that older diagnostic criteria were less accurate.
Since ME/CFS has no specific biological marker, accurate diagnostic criteria are essential for identifying patients and advancing research. This study helps clarify which symptom domains are most important for diagnosis, potentially improving how patients are identified and studied. Understanding which criteria work best could standardize diagnosis across research and clinical settings, reducing misdiagnosis.
This study does not prove which criteria set should be the gold standard for diagnosis, nor does it establish why certain domains (like post-exertional malaise) are more discriminative. It does not determine whether these criteria reflect underlying biological mechanisms or whether consensus-based approaches are superior to empirical ones overall.
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
Jason, Leonard A, Kot, Bobby, Sunnquist, Madison, Brown, Abigail, Reed, Jordan, Furst, Jacob, et al. (2014). Comparing and Contrasting Consensus versus Empirical Domains.. Fatigue : biomedicine, health & behavior. https://doi.org/10.1080/21641846.2015.1017344
BibTeX
@article{mecfsatlas-jason-2014-comparing-contrasting,
author = {Jason, Leonard A and Kot, Bobby and Sunnquist, Madison and Brown, Abigail and Reed, Jordan and Furst, Jacob and Newton, Julia L and Strand, Elin Bolle and Vernon, Suzanne D},
title = {Comparing and Contrasting Consensus versus Empirical Domains.},
journal = {Fatigue : biomedicine, health & behavior},
year = {2014},
doi = {10.1080/21641846.2015.1017344},
note = {PubMed: 26977374},
url = {https://www.mecfsatlas.com/evidence/jason-2014-comparing-contrasting},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/jason-2014-comparing-contrasting
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