E1 ReplicatedModerate confidencePEM not requiredRCTPeer-reviewedMachine draft
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Long-term efficacy of cognitive-behavioral therapy by general practitioners for fatigue: a 4-year follow-up study.
Leone, Stephanie S, Huibers, Marcus J H, Kant, Ijmert et al. · Journal of psychosomatic research · 2006 · DOI
Quick Summary
Researchers tested whether cognitive-behavioral therapy (CBT), a talk-based treatment, delivered by general doctors could help people with fatigue who were on sick leave. They followed up with patients 4 years after the original study ended. The results showed that CBT did not help—both the treatment group and the control group still had high fatigue and work absences after 4 years, suggesting that persistent fatigue has a poor long-term outlook.
Why It Matters
This study challenges the assumption that CBT delivered in primary care can improve long-term outcomes in patients with persistent fatigue. For ME/CFS patients, it raises important questions about the effectiveness of psychological interventions as standalone treatments and suggests that fatigue-related conditions may require different therapeutic approaches or multimodal interventions.
Observed Findings
Fatigue and absenteeism remained high in both intervention and control groups at 4-year follow-up.
No statistically significant differences were found between CBT and control groups on primary outcomes (fatigue and absenteeism).
The intervention group showed a trend toward less favorable outcomes compared to the control group.
The poor prognosis of persistent fatigue parallels that reported in chronic fatigue syndrome.
Initial findings of ineffectiveness at 12 months persisted through long-term follow-up.
Inferred Conclusions
CBT delivered by general practitioners is not effective in reducing fatigue or work absenteeism in the long term.
Persistent fatigue has a poor natural prognosis, comparable to chronic fatigue syndrome, and current psychological interventions in primary care may be insufficient.
Prevention of deterioration or relapse of fatigue complaints was not achieved through GP-delivered CBT.
Alternative or enhanced treatment approaches may be necessary for patients with persistent fatigue-related work disability.
Remaining Questions
Why did the intervention group trend toward worse outcomes than the control group, and what mechanisms might explain this?
What This Study Does Not Prove
This study does not prove that CBT is ineffective for all fatigue conditions or all delivery formats—it specifically evaluated GP-delivered CBT in employed individuals on sick leave, and results may not generalize to specialized CBT programs or different patient populations. The study also does not establish that fatigue is purely biological; it only demonstrates that this particular intervention approach was unsuccessful. Additionally, the study cannot explain why the intervention group showed worse trends than controls.
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 →