Table 4.

Diagnostic performance characteristics of IOM monitoring in our 1,155 patients

	Cervical SSEPs (95% CI)	Cortical SSEPs (95% CI)	MEPs (95% CI)	Multimodal technique (95% CI)
Sensitivity, %	20.00 (2.52–55.61)	20.00 (2.52–55.61)	100 (69.15–100)	100 (69.15–100)
Specificity, %	99.91 (99.51–100)	99.74 (99.24–99.95)	99.56 (98.98–99.86)	99.30 (98.63–99.70)
Positive predictive value, %	66.67 (16.45–95.31)	40.00 (11.08–78.11)	66.67 (45.48–82.75)	55.56 (38.52–71.38)
Negative predictive value, %	99.31 (99.06–99.49)	99.30 (99.05–99.49)	100 (−)	100 (−)
Positive likelihood ratio	229.00 (22.54–2326.46)	76.33 (14.26–408.53)	229.00 (95.50–549.14)	143.13 (71.75–285.50)
Negative likelihood ratio	0.80 (0.59–1.09)	0.80 (0.59–1.09)	0.00 (−)	0.00 (−)

CI, confidence interval.