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

Table 6 Correlation between EQ VAS score, EQ-5D index and scores of other measures

Other measures		Correlation EQ VAS score	Correlation EQ-5D index UK	Correlation EQ-5D index D
Symptoms	PHQ-15
	● Sum score	−0.468	−0.448^**	−0.392^**
	PHQ-9
	● Sum score	−0.489	−0.474^**	−0.345^**
Illness worries	WI-7
Illness worries	● Sum score	−0.471	−0.431^**	−0.331^**
Health-related quality of life	SF-36
	● Physical component score	0.589	0.574 ^**	0.636 ^**
	● Mental component score	0.470	0.441^**	0.221^**
	Physical functioning	0.538	0.567 ^**	0.600 ^**
	Role physical	0.423	0.467^**	0.386^**
	Bodily pain	0.599	0.579 ^**	0.595 ^**
	General health perceptions	0.633	0.509 ^**	0.464^**
	Vitality	0.586	0.555 ^**	0.412^**
	Social functioning	0.564	0.530 ^**	0.381^**
	Role emotional	0.382	0.436^**	0.254^**
	Mental health	0.517	0.477^**	0.308^**

Large correlations (|r_s| ≥ 0.5) are printed bold; ^* p < 0.0038; ^** p < 0.001; the number of observations used for the calculation was 286 ≤ n ≤ 293, subject to missing values; the correlation of the EQ VAS score with the EQ-5D index UK was |r_s| = 0.669 (p < 0.001); the correlation of the EQ-VAS with the EQ-5D index-D was |r_s| = 0.635 (p < 0.001); the correlation of the EQ-5D index UK with the EQ-5D index D was 0.886 (p < 0.001). This analysis is based on baseline data.

ISSN: 1477-7525