Togo, Fumiharu, Natelson, Benjamin H, Cherniack, Neil S et al. · Arthritis research & therapy · 2008 · DOI
This study looked at sleep patterns in people with ME/CFS, comparing those with and without fibromyalgia to healthy people. Researchers found that ME/CFS patients had worse sleep quality and felt more tired and sleepy after sleeping than healthy controls. The key finding was that some ME/CFS patients experienced frequent sleep interruptions—their sleep kept getting broken up—which made their sleep feel unrefreshing even though they didn't have diagnosable sleep disorders like sleep apnea.
Understanding why ME/CFS patients report unrefreshing sleep despite normal sleep disorder screening is crucial for improving management. This study identifies sleep fragmentation—not external sleep disorders—as a key mechanism driving fatigue and unrefreshing sleep in a subgroup, suggesting targeted approaches to consolidate sleep may benefit patients.
This cross-sectional study cannot establish causation—sleep fragmentation may result from ME/CFS pathophysiology rather than causing the illness. The study does not prove that improving sleep consolidation will reduce ME/CFS symptoms, nor does it explain the underlying biological mechanism causing fragmented sleep in this population. Findings apply to the studied cohorts and may not generalize to all ME/CFS populations.
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
Togo, Fumiharu, Natelson, Benjamin H, Cherniack, Neil S, FitzGibbons, Jennifer, Garcon, Carmen, & Rapoport, David M (2008). Sleep structure and sleepiness in chronic fatigue syndrome with or without coexisting fibromyalgia.. Arthritis research & therapy. https://doi.org/10.1186/ar2425
BibTeX
@article{mecfsatlas-togo-2008-sleep-structure,
author = {Togo, Fumiharu and Natelson, Benjamin H and Cherniack, Neil S and FitzGibbons, Jennifer and Garcon, Carmen and Rapoport, David M},
title = {Sleep structure and sleepiness in chronic fatigue syndrome with or without coexisting fibromyalgia.},
journal = {Arthritis research & therapy},
year = {2008},
doi = {10.1186/ar2425},
note = {PubMed: 18474105},
url = {https://www.mecfsatlas.com/evidence/togo-2008-sleep-structure},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/togo-2008-sleep-structure
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