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Table 3 Sensitivity and specificity of the CFS-AQ with the optimum cut off point at 0.73 (N = 226)

From: Clinical assessment of the physical activity pattern of chronic fatigue syndrome patients: a validation of three methods

  

Actometer typology

 
  

Passive

Active

 

CFS-AQ

Passive (N/%)

42/(64.6%)

56/(34.8%)

98 (43.4%)

 

Active (N/%)

23/(35.4%)

105/(65.2%)

128 (56.6%)

 

65/(100%)

161/(100%)

226/(100%)

 
  1. Predictive value of a positive test (sensitivity) PV+ = 42/65 = 0.646
  2. Predictive value of a negative test (specificity) PV- = 105/161 = 0.655