KLK3 and metastasis: Based on the coefficients of the Cox regression models that identified the predictors in either the BCR-free or metastasis-free model (age, pre-SRT PSA, PSA-DT, surgical margins, and SVI; Table 2), nomograms were developed to predict the 5-year BCR-free (Figure 3a) and metastasis-free probabilities (Figure 3b).