Table 4

Stepwise multiple regression analysis of determinants of mental health related QOL of patients with RA and AS

	Rheumatoid arthritis					Ankylosing spondylitis
	Partial correlation †					Partial correlation†
	Step 1	Step 2	Step 3	Step 4	Step 5	Step 1	Step 2	Step 3	Step 4	Step 5
p<0.05; * p<0.01; *** p<0.001.
†Partial correlation coefficients of the independent variables after adjustment of the other independent variables in the model.
Block 1—Demographics
Age	0.05	0.09*	0.12**	0.07	0.05	−0.01	0.02	0.02	0.01	0.00
Sex	−0.08*	−0.03	−0.03	−0.04	−0.02	0.00	0.04	0.08	0.06	0.07
Educational level	0.16***	0.12**	0.10**	0.11**	0.13***	0.12**	0.07	0.07	−0.00	−0.03
Block 2—Work
Paid employment		0.14***	0.08**	0.06	0.06		0.21***	0.14**	0.07	0.06
Block 3—Disease related characteristics
Disease duration			−0.01	−0.02	−0.03			0.07	0.06	0.07
Disease activity			−0.22***	−0.18***	0.07			−0.30***	−0.23***	−0.09*
Comorbidity			−0.08*	−0.07*	−0.06			−0.09**	−0.08	−0.07
Block 4—Coping
Coping with pain:
Comforting cognition				–	–				0.22***	0.20**
Decreasing activities				−0.10**	0.05				−0.12**	−0.07
Diverting attention				0.00	−0.02				0.02	0.00
Coping with limitations:
Optimism				0.24***	0.21				–	–
Pacing				–	–				–	–
Creative solutions				0.08*	0.07				−0.02	−0.04
Coping with dependence:
Accepting				0.07	0.06				0.08	0.07
Considering others				−0.06	−0.05				−0.02	−0.01
Block 5—Fatigue
General fatigue					−0.21***					−0.29
Total R²	0.03	0.05	0.11	0.21	0.25	0.01	0.06	0.16	0.23	0.30
Incremental R²	0.03***	0.02***	0.06***	0.10***	0.04***	0.01***	0.05***	0.10***	0.07***	0.07***