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| Proportion of tumour cells exhibiting nuclear β-catenin expression | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
| Cut-off (25%) | 85.7% | 62.5% | 66.6% | 83.3% |
| Cut-off (50%) | 75% | 45.4% | 33.3% | 83.3% |
PPV, positive predictive value; NPV, negative predictive value.
