Table 2

Laboratory findings in patients

TestMPA (n = 10)Classic PAN (n = 15)p value
median; range (%)median; range (%)
Erythrocyte sedimentation rate (mm/h)85; 22–12848; 28–104>0.05
C reactive protein (mg/dl)25.5; 2.9–7619.2; 0.5–48>0.05
Urea (mg/dl)39; 14–7814; 9–19<0.05
Creatinine (mg/dl)2.6; 0.4–7.80.5; 0.3-0.8<0.05
MPO-ANCA (EU/ml)42.50; 20–2505.0; 5–30<0.05
High MPO-ANCA levels10 (100)1 (6.7)
Indirect immunofluorescence staining for ANCA
 Negative09 (60)
 c-ANCA pattern05 (33)
 p-ANCA pattern9 (90)1 (6.7)
 Atypical1 (10)0