Table 1 Diagnosis CDC-1994 criteria
From: Validation of the qi blood yin yang deficiency questionnaire on chronic fatigue
Chronic fatigue syndrome symptoms |
|---|
A. Major criteria (both criteria required) |
 1. Severe fatigue >6 months |
  a. Persistent or relapsing in course |
  b. Does not resolve with bed rest |
  c. Significant reduction in average daily activity (below 50 % of prior activity) |
 2. Other causes excluded |
  a. See fatigue causes |
B. Minor criteria (4 or more present for 6Â months) |
 1. Headache |
  a. New type, severity or pattern |
  b. Typically non-focal headache |
 2. Migratory polyarthralgias |
  a. Non-inflammatory (no swelling or erythema) |
 3. Myalgias |
 4. Postexertional malaise or fatigue |
  a. Duration >24 h |
 5. Short-term memory or concentration impaired |
 6. Pharyngitis |
 7. Tender cervical or axillary adenopathy |
 8. Non-restorative sleep |