Christensen, Sara Sletten, Frostholm, Lisbeth, Ørnbøl, Eva et al. · Journal of psychosomatic research · 2015 · DOI
This study tested whether cognitive behavioural therapy (CBT) helps people with long-term functional health conditions by changing how they think about their illness. Patients who received CBT showed improvements in their physical health, and the research suggests this happened because they developed a better sense of control over their condition. The findings indicate that helping patients understand and reframe their illness beliefs may be a key reason why CBT works for these conditions.
Understanding the mechanisms by which psychological interventions work is crucial for ME/CFS patients and clinicians. This study provides evidence that CBT's benefits may operate through measurable shifts in illness beliefs and perceived control, offering insight into why some patients respond to treatment and potentially guiding more targeted, personalized approaches to care.
This study does not establish that illness perception changes cause symptom improvement in ME/CFS specifically, as it examined broader functional somatic syndromes and relied on mediation analysis rather than experimental manipulation. The findings cannot prove CBT is universally effective for ME/CFS or that changing illness perceptions alone produces all clinical benefits, nor does it address whether this mechanism applies equally to patients with severe disease or significant post-exertional malaise.
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
Christensen, Sara Sletten, Frostholm, Lisbeth, Ørnbøl, Eva, & Schröder, Andreas (2015). Changes in illness perceptions mediated the effect of cognitive behavioural therapy in severe functional somatic syndromes.. Journal of psychosomatic research. https://doi.org/10.1016/j.jpsychores.2014.12.005
BibTeX
@article{mecfsatlas-christensen-2015-changes-illness,
author = {Christensen, Sara Sletten and Frostholm, Lisbeth and Ørnbøl, Eva and Schröder, Andreas},
title = {Changes in illness perceptions mediated the effect of cognitive behavioural therapy in severe functional somatic syndromes.},
journal = {Journal of psychosomatic research},
year = {2015},
doi = {10.1016/j.jpsychores.2014.12.005},
note = {PubMed: 25541119},
url = {https://www.mecfsatlas.com/evidence/christensen-2015-changes-illness},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/christensen-2015-changes-illness
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