Influence of cytology, T stage and US status on PPV and NPV
| Variable | PPV, % (95% CI) | NPV, % (95% CI) |
| C5n versus C2n | 84.8 (76.2 to 93.5) | 66.7 (55.3 to 78.0) |
| T2/3 cases: US-suspicious versus US-negative | 77.3 (67.2 to 87.4) | 74.7 (64.2 to 85.2) |
| US-suspicious T2/3 versus T1 | 77.3 (67.2 to 87.4) | 46.9 (34.9 to 59.0) |
| US-suspicious versus US-negative: all cases | 67.0 (58.4 to 75.6) | 81.0 (73.9 to 88.2) |
| T2/3 versus T1: all cases | 48.3 (40.3 to 56.3) | 73.9 (66.9 to 81.0) |
| US-negative T2/3 versus T1 | 25.3 (15.9 to 34.7) | 85.7 (78.2 to 93.2) |
NPV, negative predictive value; PPV, positive predictive value; US, ultrasound.