. 2013 Oct 1;38(3):599–606. doi: 10.1007/s00268-013-2260-x

Table 4.

Correlation of IONM results with postoperative outcomes

IONM^a	Postoperative outcome (n)		Total (n)	Predictive value	%
IONM^a	RLN paresis	No RLN paresis	Total (n)	Predictive value	%
LOS (positive)	18	5	23	PPV	78.3
Intact signal (negative)	2	475	477	NPV	99.6
Total	20	480	500	Accuracy	98.6

Operations were performed with Neurosign^® 100 (n = 108) and NIM 2.0 or NIM 3.0 systems (n = 198)

Accuracy TP + TN/TP + TN + FP + FN, IONM intraoperative nerve monitoring, LOS loss of signal, RLN recurrent laryngeal nerve, PPV positive predictive value (TP/TP + FP), NPV negative predictive value (TN/TN + FN), TP true positive, TN true negative, FP false positive, FN false negative

^aCalculated for indirect stimulation through vagus nerve after thyroid resection (V2) and for NAR