Reid, Steven, Chalder, Trudie, Cleare, Anthony et al. · Clinical evidence · 2003
This systematic review summarizes what is known about chronic fatigue syndrome (ME/CFS) by examining existing research. The authors looked at the best available evidence about how the condition develops, how it affects people, and what treatments might help. This type of review helps doctors and patients understand the current state of knowledge about ME/CFS.
Systematic reviews are foundational tools that synthesize scattered research into coherent summaries, helping clinicians understand what treatments have evidence and what remains unclear. For ME/CFS patients and researchers, this review provides an organized assessment of the evidence landscape that existed in 2003, helping identify which interventions had research support and which areas needed further investigation.
As a systematic review synthesizing existing studies, this work does not provide new primary data or discover novel biological mechanisms. The conclusions are only as strong as the individual studies reviewed; if those studies had methodological limitations, the review's conclusions are similarly limited. Reviews published in 2003 may not reflect current understanding given significant research advances in the two decades since publication.
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
Reid, Steven, Chalder, Trudie, Cleare, Anthony, Hotopf, Matthew, & Wessely, Simon (2003). Chronic fatigue syndrome.. Clinical evidence. https://pubmed.ncbi.nlm.nih.gov/15555147/
BibTeX
@article{mecfsatlas-reid-2003-chronic-fatigue,
author = {Reid, Steven and Chalder, Trudie and Cleare, Anthony and Hotopf, Matthew and Wessely, Simon},
title = {Chronic fatigue syndrome.},
journal = {Clinical evidence},
year = {2003},
note = {PubMed: 15555147},
url = {https://www.mecfsatlas.com/evidence/reid-2003-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/reid-2003-chronic-fatigue
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