Do English and Chinese EQ-5D versions demonstrate measurement equivalence? an exploratory study

Table 2 Logistic regression: the influence of language version on EQ-5D item responses

Dependent variable	Unadjusted influence of language version			Adjusted influence of language version*
	Odds ratio (95%CI)	p-value	Corresponding proportion interval	Odds ratio (95%CI)	p-value	Corresponding proportion interval
Mobility	1.60 (0.62, 4.12)	0.330	(-17.0% to +9.8%)	2.09 (0.60, 7.30)	0.249	(-20.0% to +10.5%)
Usual activities	2.75 (0.93, 8.13)	0.067	(-20.4% to +1.4%)	4.16 (1.01, 17.09)	0.048	(-22.4% to -0.2%)
Pain/discomfort	1.10 (0.45, 2.70)	0.828	(-20.9% to +10.4%)	1.21 (0.38, 3.87)	0.752	(-29.9% to +11.9%)
Anxiety/depression	1.08 (0.50, 2.33)	0.838	(-17.6% to +17.1%)	0.97 (0.34, 2.77)	0.956	(-20.4% to +26.3%)

95%CI = 95% confidence interval; Chinese language was the reference group; self-care was excluded because no problems were reported by subjects completing the Singaporean English EQ-5D. *Adjusted for the influence of age, gender, years of education, employment status and pain VAS score. Pain VAS score was not included in the model for the pain/discomfort item.

ISSN: 1477-7525