Figure 4, Figure 5 and Figure 6 demonstrate the ROC curve analysis and the boxplot of T/PSA, while Table 3 summarizes the characteristics of the patients with PSA ≤ 10 ng/mL with and without prostate cancer. Boxplot and ROC curves of T/PSA and for the other parameters in patients with and without PCa and PSA ≤ 10 ng/mL can be seen in Figure 4, Figure 5 and Figure 6. The gene discussed is KLK3; the disease is Familial prostate cancer.