Table 3

Multiple regression analysis with disease activity score (DAS28) at 5 years of treatment as dependent outcome

Item	B	95% CI	Standardised β	p value	R²
Intercept	1.709	0.517 to 2.901		0.005
Age	0.006	−0.007 to 0.018	0.066	0.384	0.001
Gender	0.347	−0.031 to 0.725	0.139	0.071	0.017
Treatment strategy	0.174	−0.172 to 0.519	0.076	0.323	0.017
Rheumatoid factor positive	0.283	−0.083 to 0.649	0.113	0.128	0.036
Baseline disease activity	0.042	−0.126 to 0.211	0.039	0.622	0.038
EULAR good-response^*	−0.752	−1.221 to −0.284	−0.313	0.002
EULAR moderate-response^*	−0.427	−0.877 to 0.023	−0.184	0.063	0.091

↵* Early EULAR non-response used as reference category. Age, gender and treatment strategy were used as covariates. R² = explained variance. The R² is shown for every extra variable included in the model.