Table 2

Results of the stepwise linear multiple regression analysis of determinants of quality of life (QoL) in patients with ankylosing spondylitis(AS)

	ASQoL			EQ-5D
	Partial correlation coefficients			Partial correlation coefficients
	Step 1	Step 2	Step 3	Step 1	Step 2	Step 3
Gender (male)	−0.01	−0.03	0.03	−0.08	−0.07	−0.15**
Age	0.09	−0.04	−0.07	−0.12*	−0.01	−0.01
Country (Canada)		0.02	0.02		0.01	−0.01
Ethnicity (non-Caucasian)		0.13*	0.03		−0.10*	−0.03
Living with a partner		−0.01	0.01		0.04	0.03
Education (primary)		−0.03	0.10		0.15**	0.08
Helplessness		0.64***	0.37***		−0.54***	−0.24***
Employment		−0.20***	−0.15**		0.14**	0.10*
Diagnosis duration			−0.09			0.03
BASFI			0.44***			−0.22***
BASDAI			0.34***			−0.34***
Total R²	0.007	0.470	0.714	0.022	0.368	0.551
Incremental R²	0.01	0.463***	0.244***	0.022**	0.346***	0.183***

*p<0.05; **p<0.01; ***p<0.001.
BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index.