Table 2. Postoperative outcomes, comparing patients with IONM and patients without IONM.

Variable	No IONM (n=18 710)	IONM (n=589)	P value
Operative mortality (STS definition)	462 (2.5)	31 (5.3)	<0.001
ICU length of stay (hours)	45.2 (26.0–74.9)	48.5 (27.2–95.9)	<0.001
Stroke	354 (1.9)	29 (4.9)	<0.001
Prolonged ventilation (>24 hours)	2016 (10.8)	95 (16.1)	<0.001
New dialysis requirement	544 (2.9)	18 (3.1)	0.833
Re-exploration for bleeding	640 (3.4)	38 (6.5)	<0.001
Postoperative blood product transfusion	6607 (35.3)	274 (46.5)	<0.001

ICUintensive care unitIONMintraoperative neurophysiologic monitoringSTSSociety of Thoracic Surgeons