Fig. 1

Predictive value of AFR (A) and eGFR (B) for corticosteroid response in IgAN patients by ROC curve. AFR and eGFR were both predictors of corticosteroid response in IgAN patients with AUC values of 0.686 and 0.643, cut-off values of 7.53 and 78.1, sensitivity values of 61.63% and 54.65%, and specificity values of 72.96% and 67.92%, respectively (P < 0.001 and P = 0.002). AFR albumin-to-fibrinogen ratio; eGFR, estimated glomerular filtration rate; IgAN Immunoglobulin A (IgA) nephropathy; ROC receiver operating characteristic; AUC the area under the curve; CI confidence interval