[show abstract][hide abstract] ABSTRACT: This article uses data from patients recruited using the 1994 case definition of chronic fatigue syndrome (CFS) to contrast those meeting criteria for the Myalgic Encephalomyelitis/chronic fatigue syndrome (ME/CFS) Canadian case definition with those that did not meet these criteria. The study also contrasts those meeting criteria for Myalgic Encephalomyelitis (ME) based on criteria from Ramsay and other theorists with those that did not meet the ME criteria. The ME/CFS case definition criteria identified a subset of patients with more functional impairments and physical, mental, and cognitive problems than the subset not meeting these criteria. The ME subset had more functional impairments, and more severe physical and cognitive symptoms than the subset not meeting ME criteria. When applied to a population meeting the 1994 CFS case definition, both ME/CFS and ME criteria appear to select a more severe subset of patients.
Evaluation & the Health Professions 12/2011; 35(3):280-304. · 1.48 Impact Factor
[show abstract][hide abstract] ABSTRACT: This article reviews a Myalgic Encephalomyelitis (ME) case deﬁnition based on criteria offered over the
past ﬁve decades. The current paper looks to review case
deﬁnitions for ME based on Ramsay’s deﬁnition , the
“London” criteria , Hyde’s Nightingale deﬁnition ,
and Goudsmit et al.’s criteria . In general, these theorists
have argued that ME is now deﬁned differently than chronic
fatigue syndrome because ME involves an acute onset, postexertional malaise and neurocognitive problems, and fatigue
is not a major criteria. We will compare these theorists to
the recently published International Consensus Criteria for
Myalgic Encephalomyelitis . We will also attempt to consolidate aspects of different current deﬁnitions in order to
suggest possible core features of ME. This article will also
recommend the importance of providing explicit, objective
criteria on speciﬁc key symptoms. In addition, structured
interview schedules along with speciﬁc medical tests are
recommended to assure this illness is assessed in a consistent way across settings. It is hoped these developments will
lead to increased reliability of the ME case deﬁnition, as
well as more frequent use of these criteria by investigators.
Automatic Control of Physiological State and Function 10/2011; 1(14).