Moss-Morris, R, Petrie, K J · Psychological medicine · 2001 · DOI
This study compared how people with ME/CFS think and feel about their illness compared to people with depression and healthy people. The researchers found that people with ME/CFS and people with depression have different thought patterns: people with depression tend to blame themselves and doubt their worth, while people with ME/CFS focus on their physical symptoms, see themselves as sick, and tend to rest more to manage their condition. These different thinking patterns stayed consistent over 6 months and were linked to how much disability and fatigue people experienced.
This study provides evidence that ME/CFS and depression have distinct cognitive profiles, which could help clinicians differentiate between the two conditions despite overlapping symptoms and reduce misdiagnosis. Understanding the specific thought patterns and coping behaviors associated with ME/CFS validates that the condition involves genuine illness-related cognitions rather than simply psychological disturbance, and identifies potential targets for cognitive-behavioral interventions tailored to ME/CFS patients.
This study does not prove that these cognitive patterns cause ME/CFS or that they are unique to the condition—cognitive distortions about somatic symptoms may also occur in other medical illnesses. The cross-sectional design and 6-month follow-up cannot establish causality, only that these cognitions are associated with worse outcomes. The study also does not address whether activity-limiting coping behaviors are adaptive or maladaptive in ME/CFS specifically.
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
Moss-Morris, R & Petrie, K J (2001). Discriminating between chronic fatigue syndrome and depression: a cognitive analysis.. Psychological medicine. https://doi.org/10.1017/s0033291701003610
BibTeX
@article{mecfsatlas-moss-morris-2001-discriminating-between,
author = {Moss-Morris, R and Petrie, K J},
title = {Discriminating between chronic fatigue syndrome and depression: a cognitive analysis.},
journal = {Psychological medicine},
year = {2001},
doi = {10.1017/s0033291701003610},
note = {PubMed: 11305855},
url = {https://www.mecfsatlas.com/evidence/moss-morris-2001-discriminating-between},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/moss-morris-2001-discriminating-between
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