Sensitivity and specificity of the MR imaging shrimp sign of cerebellar PMLa
| Sensitivity (PML, True-Positive/False-Negative) | Specificity (Controls, True-Negative/False-Positive) | PPV | NPV | |
|---|---|---|---|---|
| Preliminary stage | 0.8 (16/4) | 0.8 (32/8) | 0.67 | 0.89 |
| Validation stage 1 | 0.8 (16/4) | 0.98 (39/1) | 0.94 | 0.91 |
| Validation Stage 2 | 0.85 (17/3) | 1 (40/0) | 1 | 0.93 |
↵a Sensitivity and specificity of the shrimp sign of cerebellar PML in the exploratory stage and following the first and second validation stages.