E0 ConsensusModerate confidencePEM unclearMeta-AnalysisPeer-reviewedMachine draft
The relation between cognitive-behavioural responses to symptoms in patients with long term medical conditions and the outcome of cognitive behavioural therapy for fatigue - A secondary analysis of four RCTs.
de Gier, M, Picariello, F, Slot, M et al. · Behaviour research and therapy · 2023 · DOI
Quick Summary
This study looked at how people with different long-term illnesses—including ME/CFS—think and behave in response to fatigue, and whether these patterns affect how well cognitive behavioural therapy (CBT) works. Researchers found that certain thought patterns and behaviours, like avoiding activity or believing that fatigue causes damage, were linked to less improvement with CBT. The good news is that when CBT helped patients change these patterns—by reducing fear, worry, and excessive rest—their fatigue improved significantly.
Why It Matters
This research identifies specific, modifiable cognitive and behavioural patterns that predict who will benefit most from CBT in ME/CFS. Understanding that certain thought patterns (damage beliefs, catastrophising) and behaviours (avoidance and excessive resting) are key targets for treatment could help clinicians tailor interventions more effectively and help patients understand what changes matter most for fatigue improvement.
Observed Findings
- Patients with higher baseline damage beliefs and avoidance/resting behaviour scores showed less improvement with CBT regardless of diagnostic group.
- Reduction in fear-avoidance, catastrophising, and avoidance/resting behaviour were significantly associated with fatigue improvement across all four conditions (ME/CFS, MS, Type 1 Diabetes, Q-fever fatigue).
- Small-to-moderate differences in CBRQ subscale scores existed between diagnostic groups, suggesting some illness-specific variation in cognitive-behavioural responses.
- The relationship between CBT and fatigue reduction was mediated by changes in these three cognitive-behavioural factors across all conditions.
Inferred Conclusions
- Cognitive-behavioural responses to fatigue are transdiagnostic perpetuating factors that moderate and mediate CBT outcome, supporting a unified treatment approach across long-term conditions.
- Patients with strong damage beliefs or high avoidance/resting at baseline may require additional targeted intervention or modified CBT approaches.
- Therapeutic mechanisms of CBT for fatigue operate through reduction of specific maladaptive cognitive and behavioural patterns, which could be prioritised in treatment delivery.
Remaining Questions
- Do these cognitive-behavioural patterns persist long-term after CBT, or do they return to baseline?
- Are there optimal thresholds or time-points for assessing these factors to predict treatment response earlier in therapy?
What This Study Does Not Prove
This study does not prove that these cognitive-behavioural patterns cause fatigue or that changing them will cure ME/CFS. It is a secondary analysis of existing trial data and cannot determine whether the observed associations reflect true causal mechanisms or bidirectional relationships. The findings apply to people who engaged with CBT and may not represent all ME/CFS patients, particularly those with severe disease or different symptom profiles.
Tags
Symptom:Fatigue
Method Flag:PEM Not DefinedWeak Case DefinitionMixed Cohort
Metadata
- DOI
- 10.1016/j.brat.2022.104243
- PMID
- 36549190
- Review status
- Machine draft
- Evidence level
- Established evidence from major reviews, guidelines, or evidence maps
- Last updated
- 8 April 2026
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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