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Table 14 Proportions shared and unique variance of the 4DSQ scales; standardised Beta-coefficients and explained (shared) variance R2 (results from multiple regression analysis)

From: The Four-Dimensional Symptom Questionnaire (4DSQ): a validation study of a multidimensional self-report questionnaire to assess distress, depression, anxiety and somatization

  Cronbach's α Standardised Beta-coefficients R2 Unique variancea
   Distress Depression Anxiety Somatization   
Distress        
- study A 0.93   0.40 0.28 0.29 0.65 0.28
- study B 0.90   0.40 0.26 0.31 0.61 0.29
- studies C-J 0.90   0.55 0.18 0.17 0.57 0.33
Depression        
- study A 0.92 0.54   0.29 -0.06 0.53 0.39
- study B 0.82 0.53   0.26 -0.05 0.48 0.34
- studies C-J 0.89 0.61   0.21 -0.05 0.53 0.36
Anxiety        
- study A 0.87 0.37 0.28   0.20 0.54 0.33
- study B 0.79 0.36 0.26   0.19 0.47 0.32
- studies C-J 0.88 0.23 0.24   0.37 0.46 0.42
Somatization        
- study A 0.83 0.49 -0.07 0.25   0.41 0.42
- study B 0.80 0.49 -0.06 0.22   0.37 0.43
- studies C-J 0.84 0.26 -0.07 0.44   0.34 0.50
  1. a Unique variance = Cronbach's α minus R2
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BMC Psychiatry

ISSN: 1471-244X

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