Table 4

Multiple regression analysis with mean yearly radiographic progression rate over 5 years of treatment as dependent outcome

Item	B	95% CI	Standardised β	p value	R²
Intercept	0.968	0.290 to 1.645		0.005
Age	−0.001	−0.010 to 0.007	−0.020	0.773	0.000
Gender	−0.123	−0.370 to 0.124	−0.068	0.328	0.008
Treatment strategy	0.171	−0.062 to 0.404	0.102	0.149	0.013
Rheumatoid factor positive	0.354	0.105 to 0.603	0.193	0.006	0.055
Baseline joint damage	0.070	0.044 to 0.095	0.365	0.000	0.200
EULAR good-response^*	−0.427	−0.740 to −0.114	−0.246	0.008
EULAR moderate-response^*	−0.091	−0.329 to 0.210	−0.054	0.552	0.242

↵* 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.