Table 4.

Median absorbance values of the anti-GBM antibodies to various antigens in patients with and without ANCA

ParameterANCA-Positive Patients (Median [1st and 3rd Quartiles])ANCA-Negative Patients (Median [1st and 3rd Quartiles])P
tNC11.188 (0.412 to 2.741)2.801 (1.294 to 3.180)a0.000
α1(IV)NC10.306 (0.222 to 0.497)0.294 (0.194 to 0.642)0.951
α3(IV)NC11.419 (0.469 to 2.902)2.751 (1.509 to 2.984)a0.000
α4(IV)NC10.335 (0.244 to 0.526)0.317 (0.205 to 1.109)0.992
α5(IV)NC10.229 (0.170 to 0.365)0.198 (0.144 to 0.299)a0.034
EA0.837 (0.387 to 2.309)1.951 (0.621 to 2.812)a0.007
EB0.857 (0.363 to 2.339)1.484 (0.537 to 2.650)a0.024
S20.992 (0.170 to 0.365)2.429 (0.832 to 2.992)a0.001
α3/α 13.465 (1.584 to 6.280) 5.815 (2.605 to 10.531)a0.018