Research abstract:

The Institute of Medicine recently proposed a new case definition for chronic fatigue syndrome (CFS), as well as a new name, Systemic Exertion Intolerance Disease (SEID).

Contrary to the Fukuda et al.’s CFS case definition, there are few exclusionary illnesses specified for this new SEID case definition.

The current study explored this decision regarding exclusionary illnesses using the SEID criteria with four distinct data sets involving patients who had been identified as having CFS, as well as healthy controls, community controls, and other illness groups.

The findings indicate that many individuals from major depressive disorder illness groups as well as other medical illnesses were categorized as having SEID. The past CFS Fukuda et al. prevalence rate in a community based sample of 0.42 increased by 2.8 times with the new SEID criteria.

The consequences for this broadening of the case definition are discussed.

From Diagnostics, 23 June 2015

Unintended Consequences of not Specifying Exclusionary Illnesses for Systemic Exertion Intolerance Disease, by Leonard A. Jason, Madison Sunnquist, Bobby Kot and Abigail Brown in Diagnostics, 23 June 2015

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