Moreover, along with clinical characteristics such as age, tumor size, and tumor number, the AUC increased to 0.862 (Figure 3D; 95% CI, 0.809 to 0.914), which suggests that urinary PDGFRB is a risk factor for NMIBC recurrence and could serve as potential non-invasive biomarker for predicting the recurrence of NMIBC. The gene discussed is PDGFRB; the disease is neoplasm.