TABLE 2.

Distribution of Changes in IONM Test and Postoperative Sensory Deficits

	Sensory Deficits	No Sensory Deficit	Total
SSEP Test only
SSEP Change	0	3	3
No SSEP Change	2	270	272
Total	2	273	275
		Sensitivity: 0.0% Specificity: 98.9%
MEP Test only
MEP Change	0	4	4
No MEP Change	2	60	62
Total	2	64	66
		Sensitivity: 0.0% Specificity: 93.8%
EMG Test only
EMG Change	0	110	110
No EMG Change	2	163	165
Total	2	273	275
		Sensitivity: 0.0% Specificity: 59.7%
SSEP and MEP Tests
Evoked Potential Change	0	7	7
No Change	2	57	59
Total	2	64	66
		Sensitivity: 0.0% Specificity: 89.1%
MEP and EMG Tests
Evoked Potential Change	0	31	31
No Change	2	33	35
Total	2	64	66
		Sensitivity: 0.0% Specificity: 51.6%
SSEP and EMG Tests
Evoked Potential Change	0	110	110
No Change	2	163	165
Total	2	273	275
		Sensitivity: 0.0% Specificity: 59.7%
SSEP, MEP, and EMG Tests
Evoked Potential Change	0	111	111
No Change	2	162	164
Total	2	273	275
		Sensitivity: 0.0% Specificity: 59.3%