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Table 1 Mean (Standard deviation) of the non-responders and responders to azithromycin. MFI-20: Multidimensional Fatigue Inventory. 4DSQ: 4 Dimensional Symptom Questionnaire. Pain VAS score: Visual analogue scale of the McGill Pain questionnaire. Stanford HAQ: Stanford Health Assessment Questionnaire. P: probability favoring the absence of a difference of the means of non-responders versus responders (Student-t test).

From: Azithromycin in Chronic Fatigue Syndrome (CFS), an analysis of clinical data

  Non responders Responders P
  Mean (SD) Mean (SD)  
Age (y) 40.3 (12.7) 34.7 (11.5) 0.023
MFI-20: General fatigue 19.1 (1.4) 18.7 (1.8) 0.267
MFI-20: Physical fatigue 18.0 (2.3) 17.7 (2.7) 0.532
MFI-20: Mental fatigue 16.4 (3.4) 15.2 (4.2) 0.112
MFI-20: Activity 15.5 (3.3) 15.1 (3.8) 0.595
MFI-20: Motivation 11.0 (4.3) 10.1 (3.6) 0.283
4DSQ: Somatisation 0.91 (0.42) 1.11 (1.03) 0.258
4DSQ: Distress 0.89 (0.54) 0.91 (0.51) 0.859
4DSQ: Depression 0.30 (0.47) 0.35 (0.49) 0.585
4DSQ: Anxiety 0.28 (0.35) 0.33 (0.38) 0.481
Pain VAS score 27.8 (23.3) 26.8 (24.2) 0.888
Stanford HAQ 1.15 (0.19) 1.14 (0.28) 0.957