Table 2

Correlation analysis of SF levels of indicated mediators and local parameters of joint inflammation for the first study population.

	SF IL-17		SF IL-23		SF CCL20
	r	p Value	r	p Value	r	p Value
RA
SF PMN count (cells/mm2)	0.278	0.211	0.189	0.400	0.489	0.021
Synovial tissue T-cell infiltration	0.185	0.463	0.064	0.801	0.453	0.059
Synovial tissue intimal lining layer hyperplasia	0.583	0.009	0.657	0.002	0.463	0.046
Synovial tissue global cellular infiltration	0.039	0.873	0.267	0.269	0.607	0.006
Non-PsA SpA
SF PMN count (cells/mm2)	0.209	0.351	−0.211	0.346	0.654	0.001
Synovial tissue T-cell infiltration	0.018	0.935	0.013	0.955	0.208	0.353
Synovial tissue intimal lining layer hyperplasia	−0.043	0.850	0.206	0.357	0.113	0.616
Synovial tissue global cellular infiltration	−0.121	0.592	0.153	0.498	0.032	0.888
PsA
SF PMN count (cells/mm2)	0.435	0.081	0.070	0.790	0.639	0.006
Synovial tissue T-cell infiltration	−0.166	0.539	0.427	0.099	−0.276	0.301
Synovial tissue intimal lining layer hyperplasia	0.159	0.556	0.159	0.556	−0.483	0.058
Synovial tissue global cellular infiltration	−0.027	0.921	0.117	0.667	0.061	0.821

All correlations were calculated with the Spearman correlation coefficient test.
PMN, polymorphonuclear; PsA, psoriatic arthritis; RA, rheumatoid arthritis; SF, synovial fluid; SpA, spondyloarthritis.