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Table 4 Pearson's correlation matrix of CDC Symptom Inventory DLV, CIS-20 and SF-36 scores for women and men.

From: Translation and validation of the Dutch language version of the CDC Symptom Inventory for assessment of Chronic Fatigue Syndrome (CFS)

  Total score Short Form Case Definition
Questionnaires       
Women (n = 127) r P r P r P
CIS-20       
   Fatigue .64 <.001 .69 <.001 .65 <.001
   Concentration .65 <.001 .69 <.001 .67 <.001
SF-36       
   Physical functioning -.68 <.001 -.64 <.001 -.64 <.001
CDC Symptom Inventory DLV       
   Total    .92 <.001 .93 <.001
   Short Form .92 <.001    .90 <.001
Men (n = 55)       
CIS-20       
   Fatigue .81 <.001 .82 <.001 .84 <.001
   Concentration .79 <.001 .84 <.001 .79 <.001
SF-36       
   Physical functioning -.84 <.001 -.80 <.001 -.85 <.001
CDC Symptom Inventory DLV       
   Total    .96 <.001 .96 <.001
   Short Form .96 <.001    .95 <.001