Sunnquist, Madison, Jason, Leonard A, Nehrke, Pamela et al. · Journal of chronic diseases and management · 2017 · DOI
This study compared two different sets of diagnostic criteria used to identify ME/CFS patients. Researchers found that 76% of people diagnosed with chronic fatigue syndrome met the newer Institute of Medicine criteria, but only 44% met the revised London criteria. The London criteria identified patients who were more severely physically impaired, suggesting that different diagnostic tools can identify different groups of patients.
Different diagnostic criteria can identify very different groups of ME/CFS patients with varying symptom severity and functional impairment. Standardizing which criteria clinicians and researchers use is essential for ensuring consistent diagnosis, enabling researchers to find reliable biomarkers, developing effective treatments, and conducting studies that can be compared across different research groups.
This study does not prove which diagnostic criteria is 'correct' or optimal—it only demonstrates that different criteria identify different populations. It does not test whether either criterion can predict treatment response or identify underlying biological causes of ME/CFS. The study does not establish causation between specific symptoms and the level of impairment observed.
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.