Sustained improvements in EQ-5D utility scores and self-rated health status in patients with ankylosing spondylitis after spa treatment including low-dose radon – an analysis of prospective radon indication registry data

Table 2 Adjusted association of timepoint of measurement with EQ-5D utility index and VAS¹

	EQ-5D utility index B [95% CI]	EQ-VAS B [95% CI]
Timepoint (reference = directly before treatment)
Directly after spa-treatment	0.09 [0.07;0.11] *¹	11.68 [9.38; 13.97] *¹
3 months after treatment	0.08 [0.06; 0.10] *¹	12.20 [9.78; 14.61] *¹
6 months after treatment	0.06 [0.05;0.09] *¹	9.70 [7.24; 12.17] *¹
9 months after treatment	0.04 [0.02;0.06] *	6.11 [3.57; 8.65] *¹
Age, mean (SD); range	-0.001 [-0.001;0.000]	-0.18 [-0.26; -0.11] *
Sex (reference = women)	0.01 [-0.00;0.03]	2.21 [0.56; 3.87] *
Body Mass Index	-0.002 [-0.004;-0.001] *	-0.22 [-0.43; -0.04] *

Associations are calculated by means of multivariable linear regression
¹number of participants included = 291
^*significant at p ≤ 0.05
¹clinically relevant improvement (i.e. ≥ 0.05 in the EQ-5D utility index and of ≥ 5.00 in the EQ-VAS)

ISSN: 1471-2474