Servaes, Petra, Prins, Judith, Verhagen, Stans et al. · Journal of psychosomatic research · 2002 · DOI
This study compared 57 women with ME/CFS to 57 women who had breast cancer and were experiencing severe fatigue after treatment. Researchers measured fatigue, physical activity, mood, sleep, and concentration using questionnaires, tests, and activity monitors worn for 12 days. While both groups experienced significant fatigue, ME/CFS patients generally had more severe symptoms overall, though some breast cancer survivors reported similar problems with sleep and concentration.
This study directly addresses whether evidence-based treatments developed for ME/CFS (specifically cognitive behavior therapy) would be equally effective for cancer-related fatigue, which has significant implications for treatment development. Understanding the similarities and differences between ME/CFS and other fatigue conditions helps researchers and clinicians tailor interventions appropriately and advance understanding of fatigue mechanisms across diseases.
This cross-sectional study cannot establish causation or determine whether fatigue in these populations arises from the same underlying biological mechanisms. The comparison does not prove that CBT interventions must differ—only that symptom profiles differ, and intervention tailoring may be warranted. The study cannot rule out selection bias or determine whether differences reflect disease pathophysiology versus other factors.
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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