KLK3 and metastasis: Univariate analysis demonstrated that PLT (OR: 1.008, P = 0.011), DD (OR: 2.690, P < 0.001), PSA (OR: 1.073, P < 0.001), Gleason score (OR: 7.060, P < 0.001) and Fib (OR: 2.082, P < 0.001) were significantly correlated with bone metastasis of Pca.