Kane, R L, Gantz, N M, DiPino, R K · Neuropsychiatry, neuropsychology, and behavioral neurology · 1997
This study compared 17 people with ME/CFS to 17 healthy controls on thinking and memory tests, as well as psychological well-being. While ME/CFS patients reported feeling cognitively foggy, most formal test scores were similar between groups. However, ME/CFS patients showed significantly higher levels of psychological distress, anxiety, and depression compared to controls.
This study highlights the dissociation between patients' reported cognitive problems and objective test performance—a common frustration in ME/CFS research. The findings underscore the substantial psychological burden associated with ME/CFS and suggest that validated cognitive testing may need modification for this population.
This study does not prove that cognitive impairment in ME/CFS is purely psychological or that it doesn't exist objectively. With only 17 participants per group and traditional neuropsychological tests that may not capture ME/CFS-specific cognitive patterns, negative findings on most measures do not rule out real cognitive dysfunction. The study cannot establish whether psychological distress causes or results from ME/CFS.
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 →
Contribute
Private, reviewed by a human. Not a public comment thread.