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2 × 2 contingency tables used to calculate test operating characteristics for tceMEP, peroneal nerve SSEP, and spontaneous EMG monitoring
| tceMEP | No deficit | Deficit |
| Positive | 6 | 5 |
| Negative | 38 | 0 |
| Sensitivity = 100% | ||
| Specificity = 86% | ||
| SSEP | No deficit | Deficit |
| Positive | 2 | 3 |
| Negative | 30 | 1 |
| Sensitivity = 75% | ||
| Specificity = 94% | ||
| EMG | No deficit | Deficit |
| Positive | 3 | 1 |
| Negative | 40 | 4 |
| Sensitivity = 20% | ||
| Specificity = 93% | ||
