Sharpe, M C, Archard, L C, Banatvala, J E et al. · Journal of the Royal Society of Medicine · 1991 · DOI
This 1991 document provides guidelines for how researchers should study ME/CFS to ensure consistent and reliable findings. Rather than reporting new experimental results, it offers recommendations on how to standardize research methods, study design, and patient definitions. It represents the thinking of leading medical experts who were trying to establish a common framework for ME/CFS research.
This guideline document was influential in establishing consensus on how ME/CFS should be studied, which helped improve research quality and comparability across institutions. Having standardized research frameworks is essential for advancing scientific understanding and ensuring that findings from different studies can be meaningfully compared and built upon.
This guideline document does not prove any specific facts about ME/CFS causes, mechanisms, or treatments—it provides recommendations for how research should be conducted. It represents expert consensus from 1991 and does not constitute experimental evidence itself; recommendations may need updating as research methods and disease understanding evolve.
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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