GRN and anti-neutrophil cytoplasmic antibody-associated vasculitis: Similarly, multivariable analysis of data from patients with serum progranulin higher than 43.01 ng/ml showed that FFS (OR 4.992, 95% CI 1.178, 21.152) and ESR (OR 1.042, 95% CI 1.010, 1.074) but not serum progranulin ≥43.01 ng/ml could predict the cross‐sectional severe AAV independently (Table 3).