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

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

	Cronbach's α	Standardised Beta-coefficients				R²	Unique variance^a
		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

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