In addition, the univariate analysis with Cox proportional hazards model found that miR-126 expression status (P < 0.001), pathological stage (P < 0.001), lymph node metastasis status (P = 0.002), and positive angiolymphatic invasion (P < 0.001) were significantly associated with BCR-free survival, while patients’ age, preoperative PSA, Gleason score, and surgical margin status were not significant factors (all P > 0.05, Table 2). This evidence concerns the gene BCR and metastatic malignant neoplasm in the lymph nodes.