Table 1.

Characteristics of patients with systemic inflammatory disease without (controls) versus with vasculitis (cases)^*

	Controls (without vasculitis) (n=11)	Cases (with vasculitis) (n=16)
Age	60.8 ± 10.8	56.3 ± 13.6
Percent female	90.9	86.7
Percent on steroid treatment	45.4	85.7
Number of blood draws	1.2 + 0.4	3.2 ± 2.4

^*In the non-vasculitis control group, no age was recorded for one patient, so age data was averaged for n=10. Similarly, in the vasculitis case group, gender information was unavailable for one patient, and steroid treatment information was missing for two patients. Therefore, gender and steroid data for this group were averaged for n=15 and n=14, respectively. Values are expressed as the mean ± standard deviation.