Table 1.
Results of Crystallization Test
| Crystallization Test Results | Diagnosis |
Total | ||
|---|---|---|---|---|
| Diseased | Non-Diseased | |||
| III* (n=65) | II* (n=50) | I (n=60) | (n=175) | |
| Positive | 61 | 40 | 17 | 118 |
| Negative | 4 | 10 | 43 | 57 |
| Sensitivity | 93.84% | 80% | - | - |
| False Negative | 6.15% | 20% | - | - |
| Specificity | - | - | 71.66% | - |
| False Positive | - | - | 28.33% | - |
* Biopsy Proven Cases; Positive predictive value (PPV) and Negative predictive value (NPV) of Crystallization test in detecting OL is 70.17% and 81.13% respectively; PPV and NPV of Ct in detecting OSCC is 78.20% and 91.48% respectively.