Table 3. Risk score analysis of RCC cases and noncancer controls.

Score	0–0.736	>0.736–8.235	PPV	NPV
Training set
Controls	19	9	0.71	0.76
RCC	6	22
Validation set
Controls	65	14	0.80	0.73
RCC	24	55
Both sets
Controls	84	23	0.71	0.80
Stage I RCC	21	55
Both sets
Controls	84	23	0.74	0.76
Stage I–II RCC	26	66

RCC, renal cell carcinoma; PPV, positive predictive value; NPV, negative predictive value.