Validity and responsiveness of the EQ-5D in assessing and valuing health status in patients with somatoform disorders

Table 4 Association between somatic symptom severity (PHQ-15) and EQ-5D

	Number of patients with problems in EQ-5D item:					EQ VAS Score		EQ-5D Index UK		EQ-5D Index D
Somatic symptom severity (PHQ-15)	Mobility (%) ^a	Self-care (%) ^a	Usual Activity (%) ^a	Pain/ Discomfort (%) ^a	Anxiety/ Depression (%) ^a	Mean (SD)	Median	Mean (SD)	Median	Mean (SD)	Median
● Minimal/ Low	14 (16.6%)	0 (0.00%)	22 (26.2%)	65 (77.4%)	44 (52.4%)	68.59 (18.75)	70	0.75 (0.16)	0.727	0.87 (0.14)	0.888
(0–9)
(n=84 / 29%)
● Medium	32 (29.1%)	2 (1.80%)	54 (51.8%)	96 (87.3%)	72 (65.5%)	58.8 (18.54)	60	0.65 (0.24)	0.691	0.80 (0.2)	0.888
(10–14)
(n=110 / 37%)
● High	38 (38.0%)	7 (7.00%)	63 (63.0%)	94 (94.0%)	79 (79.0%)	50.01 (18.72)	50	0.49 (0.32)	0.689	0.66 (0.3)	0.838
(15–30)
(n=100 / 34%)
p-value	0.006^b	0.009^b	< 0.001^b	0.004^b	0.001^b	< 0.001^c		< 0.001^c		< 0.001^c

^a Proportion of patients with problems according to the EQ-5D item in the group of patients with low / medium / high disease severity ^b Chi-square test; ^c Kruskal-Wallis test; This analysis is based on baseline data.

ISSN: 1477-7525