Powell, R, Dolan, R, Wessely, S · Journal of psychosomatic research · 1990 · DOI
This study compared how people with ME/CFS and depression think about their illness compared to people with depression alone. Researchers found that people with ME/CFS tend to blame external factors (like viruses or stress) for their symptoms, while people with depression alone tend to blame themselves. Interestingly, this outward-focused thinking may protect ME/CFS patients from some depression-related thought patterns, but may make them more vulnerable to physical symptoms like fatigue.
Understanding how ME/CFS patients psychologically process their illness—particularly whether they attribute symptoms to external versus internal causes—may help explain why ME/CFS differs from primary depression and inform more tailored psychological support strategies. The finding that external attribution may protect against certain depressive cognitions while increasing somatic symptoms has implications for how clinicians approach treatment.
This study does not establish whether external attribution is inherent to ME/CFS or develops as a psychological response to illness. It cannot prove causation—the relationship between attribution style and symptom patterns is correlational. The high proportion of depression in the CFS sample limits conclusions about ME/CFS without comorbid mood disorders.
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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