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Table 2 Distribution of CIDI/DSM-IV diagnoses, internal consistency of the scales (Cronbach's α), and mean scores (and standard deviations) of the scales per diagnostic category (n = 295)

From: Detecting depressive and anxiety disorders in distressed patients in primary care; comparative diagnostic accuracy of the Four-Dimensional Symptom Questionnaire (4DSQ) and the Hospital Anxiety and Depression Scale (HADS)

   questionnaire scales
Diagnoses number of patients (%) 4DSQ distress (α 0.90) 4DSQ depression (α 0.86) 4DSQ anxiety (α 0.86) HADS depression (α 0.83) HADS anxiety (α 0.78)
Major depression 146 (49) 26.2 (4.9) 5.3 (3.3) 7.6 (5.5) 12.7 (3.4) 13.0 (3.7)
- mild 68 (23) 24.7 (5.2) 4.0 (2.7) 5.4 (4.7) 12.0 (3.3) 11.3 (3.4)
- moderate 36 (12) 26.4 (4.7) 5.3 (3.3) 8.7 (5.5) 12.5 (3.6) 13.7 (3.0)
- severe 42 (14) 28.4 (3.4) 7.5 (3.2) 10.2 (5.4) 14.1 (3.1) 15.0 (3.4)
Anxiety disorder 99 (34) 26.6 (5.2) 5.6 (3.4) 9.5 (5.5) 12.5 (3.4) 14.0 (3.2)
- generalized anxiety disorder 61 (21) 26.7 (4.9) 5.7 (3.3) 8.3 (5.4) 12.3 (3.0) 13.9 (3.1)
- panic disorder w/o agoraphobia 12 (4) 27.5 (4.5) 6.8 (3.8) 10.3 (3.5) 12.0 (3.8) 15.7 (2.7)
- panic disorder w/ agoraphobia 11 (4) 24.7 (5.8) 5.5 (3.4) 13.8 (4.7) 12.8 (3.9) 14.2 (3.9)
- agoraphobia w/o panic disorder 10 (3) 25.4 (8.2) 4.1 (3.2) 11.4 (7.6) 13.8 (4.6) 13.8 (3.9)
- social phobia 32 (11) 28.4 (3.6) 6.1 (3.1) 12.4 (5.5) 13.4 (3.8) 14.8 (3.0)
No depressive or anxiety disorder 115 (39) 18.3 (7.4) 2.2 (2.8) 3.3 (4.0) 8.1 (4.2) 9.4 (3.7)
  1. 4DSQ = Four-Dimensional Symptom Questionnaire
  2. HADS = Hospital Anxiety and Depression Scale
  3. w/= with, w/o = without