TABLE 3.

Side effects after administration during the operation

	Ketamine (n = 153)	Saline (n = 155)	p
Vomiting 5 min	4 (2.6%)	2 (1.3%)	.668
15 min	3 (2.0%)	1 (0.6%)	.606
Out of operation room	1 (0.7%)	0 (0%)	.497
Headache 5 min	15 (9.8%)	3 (1.9%)	.003
15 min	6 (3.9%)	1 (0.6%)	.122
Out of operation room	2 (1.3%)	1 (0.6%)	.991
Hallucination 5 min	24 (15.7%)	0 (0%)	<.001
15 min	6 (3.9%)	0 (0%)	.014
Out of operation room	1 (0.7%)	0 (0%)	.497
Dizziness 5 min	56 (36.6%)	0 (0%)	<.001
15 min	34 (22.2%)	2 (1.3%)	<.001
Out of operation room	2 (1.3%)	1 (0.6%)	.991