Statistical analysis
All tests were conducted at the P = 0.05 level of signifi- cance. All P values are two-tailed. ANOVA and post hoc test were used to compare the levels of PSMA mRNA. The association of PSMA expression with various clinicopath- ological features was analyzed using Spearman’s rank correlation coefficient test. Cumulative survival was esti- mated by the Kaplan–Meier method, and differences between survival curves were analyzed by log-rank test.