Butler, S, Chalder, T, Ron, M et al. · Journal of neurology, neurosurgery, and psychiatry · 1991 · DOI
This study tested whether cognitive behaviour therapy (CBT)—a type of talk therapy focusing on thoughts and behaviors—could help 50 ME/CFS patients who had been sick for an average of five years. Patients received therapy aimed at identifying unhelpful beliefs about their symptoms and gradually returning to activities. The therapy led to meaningful improvements in fatigue, overall functioning, and mood, though some patients refused treatment.
This early study challenged pessimistic views about ME/CFS prognosis and suggested that cognitive-behavioral approaches could benefit patients, influencing subsequent treatment research. It raises important questions about whether unhelpful illness beliefs perpetuate disability and whether graded activity resumption is beneficial—topics that remain debated in ME/CFS care.
This study does not prove CBT is superior to other treatments or placebo, as there was no control group. It cannot determine whether improvements were due to the therapy itself, natural recovery, attention from clinicians, or other factors. The high refusal rate and open design also limit generalizability to broader ME/CFS populations.
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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