Table 3. Results of the regression analysis models built for the EQ-5D, EQ VAS and PDQ-39 separately.

Variables	Model 1 – EQ-5D	Model 2 – EQ VAS	Model 3 – PDQ-39	Model 4 – HY†
	ln (total cost)	ln (total cost)	ln (total cost)	ln (total cost)
Age	−0.021 (0.013)	−0.027** (0.014)	−0.0168 (0.013)	−0.0338*** (0.012)
Male	−0.325 (0.317)	−0.356 (0.328)	−0.274 (0.311)	−0.466* (0.277)
Disease duration	0.076*** (0.028)	0.094*** (0.027)	0.0885*** (0.027)	0.0194 (0.032)
EQ-5D	−1.530*** (0.561)	-	-	-
EQ VAS	-	−0.023** (0.008)	-	-
PDQ-39	-	-	0.0142 (0.011)	-
HY I	-	-	-	−2.457*** (0.450)
HY II	-	-	-	−0.366* (0.189)
HY IV	-	-	-	−0.112 (0.115)
Constant	15.42*** (0.977)	16.14*** (1.162)	13.44*** (0.971)	16.60*** (0.899)
Observations	95	91	101	99
F	5.81	5.89	4.10	9.21
P	0.0003	0.0003	0.0041	0.000
R-squared	0.205	0.215	0.146	0.375

*p<0.1,

** p<0.05,

*** p<0.01;

^†HY III was used as reference category in Model 4; t-statistics in parentheses.