Hadlandsmyth, Katherine, Vowles, Kevin E · Journal of psychosomatic research · 2009 · DOI
This study looked at how depression, fatigue, and disability are connected in people with ME/CFS. Researchers found that depression plays an important role in explaining why severe fatigue leads to disability—especially difficulties with social and emotional functioning. This suggests that treating depression alongside fatigue management might be important for improving quality of life.
Understanding how depression influences the fatigue-disability relationship could help clinicians identify which patients may benefit most from integrated treatment approaches addressing both depression and fatigue. This has implications for treatment prioritization and may improve functional outcomes for ME/CFS patients.
This study cannot establish causality—it does not prove that depression causes disability or that treating depression will reduce disability. The cross-sectional design means we cannot determine whether depression develops as a consequence of fatigue and disability, or whether it is an independent factor. The findings apply specifically to people seeking treatment at a tertiary care facility 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
Hadlandsmyth, Katherine & Vowles, Kevin E (2009). Does depression mediate the relation between fatigue severity and disability in chronic fatigue syndrome sufferers?. Journal of psychosomatic research. https://doi.org/10.1016/j.jpsychores.2008.08.002
BibTeX
@article{mecfsatlas-hadlandsmyth-2009-does-depression,
author = {Hadlandsmyth, Katherine and Vowles, Kevin E},
title = {Does depression mediate the relation between fatigue severity and disability in chronic fatigue syndrome sufferers?},
journal = {Journal of psychosomatic research},
year = {2009},
doi = {10.1016/j.jpsychores.2008.08.002},
note = {PubMed: 19073290},
url = {https://www.mecfsatlas.com/evidence/hadlandsmyth-2009-does-depression},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-29. https://www.mecfsatlas.com/evidence/hadlandsmyth-2009-does-depression
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