1.  Frequency distribution of the number of fulfilled classification criteria for RA (ACR 1987) in relation to the proportion of positive anti-CCP antibodies at baseline. **p<0.01; ***p<0.001.
 Frequency distribution of the number of fulfilled classification criteria for RA (ACR 1987) in relation to the proportion of positive anti-CCP antibodies at baseline. **p<0.01; ***p<0.001.
A Kastbom et al. Ann Rheum Dis 2004;63:
©2004 by BMJ Publishing Group Ltd and European League Against Rheumatism