KLK3 and posterior cortical atrophy: Table 1 presents the clinical characteristics of PCa patients. No significant differences were observed in age, PSA level (most recent), clinical stage, pathologic stage, Gleason grade, surgical margin resection status, number of dissected lymph nodes, number of positive lymph nodes, and N stage between the two datasets. After univariate and multivariate analyses, the risk score and Gleason grade remained significant factors for the prediction of LNI with the lowest AIC value (AIC = 136.5) (Table 2).