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C F S  - Information International     
 

What  is  CFS  -   CFS/ ME  ?

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CFS Case Definition

The CFS case definition defined by the CDC,  Fukuda et al., 1994.  This definition was introduced as a means intended for research. A first set of criteria, [Holmes et al., Ann Intern Med 1988; 108:387-9] was hereby  replaced.

A study comparing the two CFS-definitions found the 1988-definition more likely to include cases arisen as infectious diseases,  Arpino et al., 1999., and more disabled and longtime sufferers,  De Becker et al., 2001, and  Jason et al., 2001.

Diagnostic criteria set by trans-NIH working group for research on CFS, diagnostic.criteria.NIH06.txt.  Dr. Reeves  answers questions relating to the current CFS definition, reeves.etal06.txt.

A pediatric case definition for ME and CFS, jason.etal06.txt.

Aggressive efforts may be required to promote a more inclusive case definition, friedberg.etal07.txt, friedberg.etal.07.txt, friedberg.etal07.pdf.

Recently an epidemiological definition was proposed, osoba.etal07.txt.

The problems inherent in present case definition(s),  Jason et al., 1999, and  Jason et al., 2000.  Negotiating the diagnostic uncertainty of contested illnesses: physician practices and paradigms, swoboda08.txt, swoboda08.pdf.

A discussion on the importance of the CDC-defined diagnosis compared to the absence of symptoms other than fatigue, letter.stouten04.txt, letter.stouten04.pdf  reply, letter.bleijenberg.etal04.txt, letter.bleijenberg.etal04.pdf.

Using a broad or narrow definition of CFS will have crucial influences on CFS epidemiologic findings, on rates of psychiatric comorbidity, and ultimately on the likelihood of finding a biological marker and identified etiology, jason.richman07.txt, jason.richman.07.txt.

 

2003 - Canadian Case Criteria for CFS

A Canadian clinical working case definition for CFS was published in 2003,  ME/CFS, Canadian clinical definition, 2003,  Carruthers et al., 2003 Carruthers et al., 2003 (pdf).   The editorial in connection with the new guidelines,  editorial, JCFS, 2003.  A short summary of the Canadian guidelines, carruthers.etal.short03.txt  and  canadian.guidelines.summary04.txt.  The Canadian guidelines request laborious testing, a problem in clinical practice according to Dr. Shepherd, comment.canadian.guidelines04.txt. A Swedish attempt to make cohorts less heterogeneous, me-cfs.se08.txt.

 

The Nightingale Definition of Myalgic Encephalomyelitis (M.E.), nightingale.definition06.txt, Definitions and aetiology of Myalgic Encephalomyelitis (ME): how the Canadian consensus clinical definition of ME works, carruthers06.txt.
 

Comparing the Fukuda et al. criteria and the Canadian Case Definition for CFS, jason.etal04.txt,  jason.etal04.pdf,   d Both definitions select individuals who are significantly different from psychiatric controls with chronic fatigue, and the Canadian criteria select cases with less psychiatric co-morbidity, more physical functional impairment, and more fatigue/weakness, neuropsychiatric, and neurological symptoms.

 

The NICE trial in the UK does not stick to strict CFS diagnostic criteria, cfs-definition07.txt.

 

Future CFS Definition(s)

Identification of ambiguities in the 1994 CFS research case definition and recommendations for resolution, reeves.etal03.txt,  reeves.etal03.pdf. The Swedish CFS research team’s results raise fundamental questions about the 1994 Centers for Disease Control criteria as (1) there was no empirical support for the requirement of four of eight cardinal CFS symptoms; (2) these eight symptoms were not equivalent in their capacity to predict fatigue; and (3) no combination of symptoms was markedly more heritable, sullivan.etal05.txt, sullivan.etal05.pdf.

 

Improving the 1994 CDC-diagnostic criteria:  identification of new diagnostic symptoms, the use of severity ratings for symptomatology, and the identification of standardized measures that differentiate cases of CFS from other conditions, king.jason04.txt, king.jason04.pdf.

Jason et al. defined 4 subgroups within an empirical CFS definition, jason.etal07.txt, jason.etal07.pdf.

 

Is there a test for CFS or FM ?

An unverified spectroscopic diagnosis of CFS in serum samples has been suggested, sakudo.etal06.txt, sakudo.etal.06.txt, sakudo.etal06.pdf. With FM unverified findings of urine markers, ribel-madsen.etal07.txt.

A test for identification of CFS by means of gene expression, kerr.etal.06.txt, kerr.etal06.txt, kerr.etal06.pdf, and xie.etal06.txt. CD19+ genes identified could provide robust and biologically meaningful basis for the early detection and unambiguous phenotyping of CFS, aspler.etal08.txt, aspler.etal08.pdf.

A patent application (WO/2008/010082): Diagnostic method for FMS or CFS, Patent2008.DiagFM.CFS.txt.

Who gets the syndrome ? hempel.etal07.txt, hempel.etal.07.txt, hempel.etal07.pdf.

Failure to recover from acute infection with Mononucleosis was not related to body weight, schur.etal07.txt, schur.etal07.pdf.

 

CFS in International Classification of Diseases (ICD)

CFS is classified (coded) in WHO's (1992) ICD-10 (International Classification of Diseases) as G93.3, a subcategory under diseases of the brain,  (i.e. a neurological disease). On the classification issue following a WHO note 23 Jan 2004, who.classification.us04.txt. The WHO website on this issue, who.guide.online.link04.txt.

In the US a modification of the previous WHO coding ICD-9, a so called ICD9-CM is still in use (CM  "Clinical Modifications").  This results in difficulties in relation to CFS, as this disease is not covered by the ICD-9.  However, the US has adopted the ICD-10 (including clinical modifications) supposedly to be in use by 2004.  A short note on the classification of CFS and ME by the WHO, codes.who.explanation04.txt.

An alternative to WHO, e-medicine classification, e-medicine.cfs07.txt.

 

CFS/ ME in UK Classification

In 2004 the British WHO-associated office finally accepted the correct CFS/ ME code as G93.3, who.coding.cfs.me04.txt.  Dr. Charles Shepherd wrote to the UK National Health Service to make this institution change its information on the coding question, classification.cfs.complaint04.txt. The correct WHO classification of CFS is now a fact even in the UK as shown by their statement 24, Jan 2004, who.classification.me.cfs04.txt.  Some interesting considerations over the ME-term endings “itis” and “pathy”, who.classification.consideration04.txt.

A short summary of the ICD-10 coding of CFS, as opposed to the coding of Neurastenia written by a CFS/ME-activist,  ICD-10, clarification, and   ICD-10, Neurastenia. 

Problems may arise in the future if WHO supports a "wider" fatigue definition as opposed to a "narrow" fatigue definition. This relates to the future ICD-11 coding of CFS Skapinakis et al., 2003,   Skapinakis et al., 2003 (pdf).

 


 
 

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