CFS/ME

CFS/ME is an alternative form of the name ME/CFS. The name CFS/ME is used by the National Health Service (NHS) in the United Kingdom between 2007 and 2021.

Case definitions defining ME/CFS

 * Canadian Consensus Criteria (CCC) A diagnosis of moderate and severe forms of ME/CFS are accurately made using this criterion. Adults can be diagnosed at six months while pediatric cases are diagnosed at three months.


 * Systemic Exertion Intolerance Disease (SEID) - ME/CFS (SEID) is accurately diagnosed when the basic criteria are met. The Institute of Medicine report as a whole is a comprehensive review of the medical literature available at time of publication (2015). Adults can be diagnosed at six months while pediatric cases are diagnosed at three months.

Case definition defining ME

 * International Consensus Criteria (ICC) - This criterion will accurately diagnose myalgic encephalomyelitis (ME). There is no requirement that the individual have symptoms for a specified period of time for diagnosis, as opposed to Fukuda and SEID, which both require 6 months in adults.