Double positivity for antineutrophil cytoplasmic antibody (ANCA) and anti-glomerular basement membrane antibody could predict end-stage renal disease in ANCA-associated vasculitis: a monocentric pilot study.

Double positivity for ANCA and anti-GBM at diagnosis were observed in 7.3% of AAV patients, and it could predict ESRD occurrence during follow-up in Korean patients with AAV.Key Points• 7.3% of AAV patients had double positivity for ANCA and anti-GBM at diagnosis (total n = 96)• Double positivity for ANCA and anti-GBM could predict ESRD occurrence during follow-up (HR 9.021, P = 0.004)• AAV patients with double positivity for ANCA and anti-GBM exhibited the lower cumulative ESRD-free survival rate compared with those without (P = 0.044).