Wenz, H, Wenz, R, Groden, C et al. · Clinical neurology and neurosurgery · 2015 · DOI
This study looked at 103 patients who had surgery for benign brain tumors or aneurysms and were physically recovered afterward. Researchers found that patients with a history of psychiatric conditions before surgery reported worse quality of life, more sleep problems, more fatigue symptoms, and more PTSD symptoms after surgery compared to those without prior psychiatric history—even though both groups had similar physical recovery.
This study identifies pre-existing psychiatric conditions as a significant independent predictor of post-treatment outcomes including fatigue and sleep dysfunction—findings directly relevant to ME/CFS, which frequently co-occurs with psychiatric comorbidities. For ME/CFS patients, this highlights the importance of integrated psychiatric and medical assessment when evaluating treatment outcomes and post-interventional quality of life.
This study does not establish causation between psychiatric history and post-operative fatigue/sleep symptoms; it is purely observational and cannot distinguish whether pre-existing psychiatric conditions directly cause worse outcomes or whether shared underlying mechanisms affect both. The study does not demonstrate that psychiatric treatment would improve post-operative outcomes, nor does it establish ME/CFS etiology or prevalence in the general population.
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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