KLK3 and neoplasm: The results showed that PPAT SUV remained a significant predictor of DPFS (p = 0.003; hazard ratio = 1.50 for 0.10 increase; 95% confidence interval 1.15–1.96) as did the with TNM stage (p = 0.013), while both serum PSA (p = 0.050) and tumor SUV (p = 0.054) revealed borderline statistical significance.