E0 ConsensusModerate confidencePEM unclearMeta-AnalysisPeer-reviewedReviewed
Is the effect of cognitive behaviour therapy for chronic fatigue syndrome (ME/CFS) moderated by the presence of comorbid depressive symptoms? A meta-analysis of three treatment delivery formats.
Kuut, T A, Buffart, L M, Braamse, A M J et al. · Journal of psychosomatic research · 2024 · DOI
Quick Summary
This study looked at whether cognitive behaviour therapy (CBT) works differently for ME/CFS patients depending on whether they also have depression. The researchers combined data from six clinical trials with over 1,000 patients and found that for internet-based CBT, patients with depression improved less than those without depression. However, for face-to-face CBT (whether one-on-one or in groups), depression didn't seem to affect how much patients improved.
Why It Matters
This research directly addresses an important clinical gap: understanding which ME/CFS patients benefit most from different CBT formats. For patients with both ME/CFS and depression—a common combination—the findings suggest choosing face-to-face CBT may lead to better outcomes, potentially improving treatment selection and patient outcomes.
Observed Findings
- In internet-based CBT, patients with comorbid depressive symptoms showed significantly less reduction in fatigue severity compared to those without depressive symptoms.
- Patients with depressive symptoms in internet-based CBT remained more often severely fatigued post-treatment than non-depressed patients.
- In individual face-to-face CBT, depressive symptoms did not significantly moderate treatment effects on fatigue severity.
- In group face-to-face CBT, depressive symptoms did not significantly moderate treatment effects on fatigue severity.
- No moderation by depressive symptoms was found for functional impairment or physical functioning outcomes across any delivery format.
Inferred Conclusions
- Face-to-face CBT (individual or group) is currently the preferred delivery format for ME/CFS patients with comorbid depressive symptoms.
- Internet-based CBT requires further development to be equally effective for ME/CFS patients experiencing depression.
- The therapeutic alliance and direct contact in face-to-face settings may buffer against the negative impact of depressive symptoms on treatment outcomes.
Remaining Questions
- What specific mechanisms explain why depression moderates internet-based CBT efficacy but not face-to-face CBT efficacy?
What This Study Does Not Prove
This study does not prove that depression causes reduced CBT effectiveness; rather, it shows an association in internet-based treatment. The findings also do not address whether treating depression first might improve subsequent CBT outcomes, nor do they establish mechanisms explaining why depression moderates internet-based but not face-to-face CBT.
Tags
Symptom:Fatigue
Method Flag:Weak Case DefinitionPEM Not Defined
Metadata
- DOI
- 10.1016/j.jpsychores.2024.111850
- PMID
- 38970879
- Review status
- Editor reviewed
- Evidence level
- Higher-level evidence type — systematic reviews, meta-analyses, guidelines, or major syntheses (study type, not a quality guarantee)
- Last updated
- 12 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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