| Cutoff point (mm) | ||
| 3 mm | 3.2 mm | 3.4 mm |
FP | 10 | 8 | 6 |
TN | 40 | 42 | 44 |
TP | 47 | 44 | 41 |
FN | 3 | 6 | 9 |
Sensitivity | 94% | 88% | 82% |
Specificity | 80% | 84% | 88% |
PPV | 82% | 84% | 87% |
NPV | 93% | 87% | 83% |