Bazelmans, E, Vercoulen, J H, Galama, J M et al. · Nederlands tijdschrift voor geneeskunde · 1997
This study asked general doctors across the Netherlands how many ME/CFS and fibromyalgia patients they saw in their practices. Based on their responses, researchers estimated that about 112 out of every 100,000 people in the Netherlands have ME/CFS, and 157 out of every 100,000 have fibromyalgia. The study found that both conditions affect mostly women and tend to develop in early-to-middle adulthood.
This study provides rare epidemiological data on ME/CFS prevalence in a developed healthcare system during the 1990s, helping establish that ME/CFS is not exceptionally rare and affects a substantial proportion of the population. Understanding prevalence is critical for resource allocation, healthcare planning, and recognition of disease burden in clinical practice.
This study does not prove diagnostic criteria or case definitions for ME/CFS; it relies on physicians' own identification of patients, which may vary widely. It also does not establish causation or pathophysiology, nor does it assess symptom severity, duration of illness, or functional impact. The cross-sectional design provides only a snapshot and cannot determine incidence or prognosis.
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 →
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