Table 5.

Postoperative events in BIS and Standard practice groups.

	BIS n (%)	Standard practice n (%)	p
Intraoperative awareness			0.663
No	1,700 (99.9%)	5,007 (99.9%)
Yes	2 (0.1%)	4 (0.1%)
Headache/dizziness			0.191
No	1671 (98.2%)	4,942 (98.6%)
Yes	31 (1.8%)	69 (1.4%)
Postoperative nausea/vomiting			0.076
No	1,491 (87.6%)	4,304 (85.9%)
Yes	211 (12.4%)	707 (14.1%)
Respiratory event			0.061
No	1661 (97.6%)	4,926 (98.3%)
Yes	41 (2.4%)	85 (1.7%)
Cerebrovascular event			0.785
No	1698 (99.8%)	5,001 (99.8%)
Yes	4 (0.2%)	10 (0.2%)
Patients’ satisfaction	4.0 (4.0–5.0)*	4.0 (4.0–5.0)*	0.077

*Data were expressed as median (25–75% interquartile values).