Table 4b.

Correlation between plasma PR3 and markers of leucocyte activation

	Vasc-pat CC (95% CI)	DC CC (95% CI)	HBD CC (95% CI)
PR3 versus NGAL	0·04 (− 0·22–0·29) n.s.	0·26 (− 0·03–0·51) n.s.	0·10 (− 0·28–0·46) n.s.
PR3 versus NGAL/C	0·11 (− 0·15–0·36) n.s.	0·30 (0·01–0·55) s.	−0·03 (− 0·42–0·37) n.s.
PR3 versus sTNFr1	−0·07 (− 0·32–0·19) n.s.	0·08 (− 0·22–0·36) n.s.	0·15 (− 0·24–0·50) n.s.
PR3 versus sTNFr1/C	−0·04 (− 0·29–0·23) n.s.	−0·10 (− 0·38–0·19) n.s.	−0·12 (− 0·5–0·30) n.s.

Vasc-pat = all vasculitis patients. DC = disease controls. HBD = healthy blood donors. CC = correlation coefficient. 95% CI = 95% confidence interval. NGAL/C = NGAL divided by cystatin C. sTNFr1/C = sTNFr1 divided by cystatin C. n.s. = non-significant, s. = significant.