Estévez-López, Fernando, Mudie, Kathleen, Wang-Steverding, Xia et al. · Journal of clinical medicine · 2020 · DOI
This research review looked at how common ME/CFS is across Europe by examining studies published between 1994 and 2019. The researchers found very few good-quality studies on this topic, and the estimates of how many people have ME/CFS varied widely (from 0.1% to 2.2% of the population). The review concludes that we urgently need better, larger studies to understand how many Europeans actually have this condition.
Understanding how many people in Europe have ME/CFS is essential for healthcare planning, research funding allocation, and recognizing the true disease burden. This review reveals a critical gap in our knowledge—very few reliable statistics exist—highlighting why better epidemiological research is urgently needed to give ME/CFS patients appropriate visibility and resources.
This review does not prove what causes ME/CFS, nor does it establish actual prevalence rates with certainty—the wide variation (0.1–2.2%) reflects differences in study methods rather than true prevalence. It also cannot explain why certain populations may be more or less affected, as the small number and poor quality of existing studies limit firm conclusions.
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
Estévez-López, Fernando, Mudie, Kathleen, Wang-Steverding, Xia, Bakken, Inger Johanne, Ivanovs, Andrejs, Castro-Marrero, Jesús, et al. (2020). Systematic Review of the Epidemiological Burden of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Across Europe: Current Evidence and EUROMENE Research Recommendations for Epidemiology.. Journal of clinical medicine. https://doi.org/10.3390/jcm9051557
BibTeX
@article{mecfsatlas-estvez-lpez-2020-systematic-review,
author = {Estévez-López, Fernando and Mudie, Kathleen and Wang-Steverding, Xia and Bakken, Inger Johanne and Ivanovs, Andrejs and Castro-Marrero, Jesús and Nacul, Luis and Alegre, Jose and Zalewski, Paweł and Słomko, Joanna and Strand, Elin Bolle and Pheby, Derek and Shikova, Evelina and Lorusso, Lorenzo and Capelli, Enrica and Sekulic, Slobodan and Scheibenbogen, Carmen and Sepúlveda, Nuno and Murovska, Modra and Lacerda, Eliana},
title = {Systematic Review of the Epidemiological Burden of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Across Europe: Current Evidence and EUROMENE Research Recommendations for Epidemiology.},
journal = {Journal of clinical medicine},
year = {2020},
doi = {10.3390/jcm9051557},
note = {PubMed: 32455633},
url = {https://www.mecfsatlas.com/evidence/estvez-lpez-2020-systematic-review},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-29. https://www.mecfsatlas.com/evidence/estvez-lpez-2020-systematic-review
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