Fig. 1

Kaplan-Meier kidney survival curves of IMN patients by serum factor Bb tertiles. IMN patients were stratified into three groups based on the tertiles of serum factor Bb levels: lowest tertile < 1.21(10³ng/mL), middle tertile 1.21–3.68 (10³ng/mL), and highest tertile > 3.68(10³ng/mL). IMN, idiopathic membranous nephropathy.