Therefore, based on this theoretical basis, although a parameter of BMI ≥ 28 kg/m2 did not affect all-cause mortality, this study demonstrates that the BARD score, including the parameters of AST/ALT ratio ≥ 0.8 and the presence of T2DM, could predict all-cause mortality in AAV patients. The gene discussed is GPT; the disease is anti-neutrophil cytoplasmic antibody-associated vasculitis.