McCue, P, Scholey, A B, Herman, C et al. · Journal of telemedicine and telecare · 2002 · DOI
This study tested whether a telephone-based brain function test could accurately detect thinking problems in people with ME/CFS. Researchers compared two versions of the same test—one on a computer and one done by telephone—in 30 people with ME/CFS and 30 healthy people. Both versions showed that people with ME/CFS were significantly slower at thinking tasks involving attention, memory, and focus, confirming that cognitive problems are real and measurable in this illness.
Many people with ME/CFS have severe mobility limitations that make it difficult to travel to research centers or clinics for testing. This study shows that cognitive testing can be done reliably by telephone, making it easier for patients—particularly those with the most severe disease—to participate in research and have their cognitive problems formally documented.
This study does not prove what causes cognitive impairment in ME/CFS or whether it worsens over time. It also does not test whether cognitive problems relate to post-exertional malaise (PEM) or other specific ME/CFS symptoms, and the relatively small sample size and 2002 date limit generalizability to current 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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