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Table 3 Distribution of ME/CFS cases (prevalent and incident) according to the study case definitions

From: Prevalence of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) in three regions of England: a repeated cross-sectional study in primary care

ME/CFS Diagnostic Criteria

 

n

%

Any ME/CFS diagnostic criteria

 

278

100.0

CDC - 1994

 

270

97.1

CDC - 1994 onlya

 

103

37.1

Canadian

 

146

52.5

Canadian onlya

 

1

0.4

ECD

 

47

16.9

ECD onlya

 

7

2.5

Overlap of case definitions

CDC - 1994 and Canadian

127

45.7

 

CDC - 1994, Canadian and ECD

18

6.5

 

CDC - 1994 and ECD

22

7.9

  1. aNon compliant with other definitions