Plasma IL-35 concentration and clinicopathological characteristics of patients with PCA. (A) Plasma IL-35 concentration among patients with either PCA or BPH and the HC group. *P<0.05 and ****P<0.0001. (B) Plasma IL-35 concentration among of patients with different Gleason scores. *P<0.05 and ***P<0.001. (C) Plasma IL-35 concentration among of patients with different Tumor-Node-Metastasis stages. ***P<0.001. (D) Plasma IL-35 concentration of patients with or without lymph node metastasis. ****P<0.0001. (E) Plasma IL-35 concentration of patients with or without distant metastasis. ****P<0.0001. (F) Overall survival rate of patients with PCA with a high or low plasma IL-35 concentration. P=0.0071. IL-35, interleukin-35; PCA, prostate cancer; BPH, benign prostatic hyperplasia; HC; healthy control; N0, negative for lymph node metastasis; N1, positive for lymph node metastasis; M0, negative for distant metastasis; M1, positive for distant metastasis.