Table 2.

Clinical yield of a series of relapse biomarkers in 30 patients with GPA.

Biomarker	Clinical yield if <baseline	Clinical yield if >baseline	P value
White cell count	11.22%	30.21%	0.01
Neutrophil count	11.98%	31.43%	0.01
Lymphocyte count	18.13%	23.53%	0.92
Monocyte count	20.23%	21.40%	0.63
ANCA titre	18.24%	22.79%	0.7
Anti-PR3 antibodies	7.86%	24.81%	0.0003
CRP	15.67%	32.31%	0.002
Creatinine	17.33%	23.40%	0.74
Neutrophil count, CRP, and anti-PR3	14.81%	58.89%	0.02