Table 3 Correlations between the concentrations of microparticles binding the various complement components or complement activator molecules in synovial fluid and plasma of RA patients and plasma of healthy individuals.

	RA synovial fluid		RA plasma		Control plasma
	r	p Value	r	p Value	r	p Value
C1q pos MP vs C4 pos MP	0.660	0.0533	0.908	0.0007	0.632	0.0498
C1q pos MP vs C3 pos MP	0.961	0.0001	0.205	0.5963	0.542	0.1057
CRP pos MP vs C1q pos MP	0.433	0.2841	0.903	0.0021	0.683	0.0296
SAP pos MP vs C1q pos MP	−0.015	0.9725	0.492	0.1786	0.280	0.4339
IgM pos MP vs C1q pos MP	0.728	0.0408	−0.175	0.6527	0.159	0.6611
IgG pos MP vs C1q pos MP	0.952	0.0003	0.420	0.2606	0.505	0.1364

Correlation analysis was performed using Pearson's correlation test (r, correlation coefficient; p, two‐tailed significance level, considered significant at p<0.05).