General anesthesia with S-ketamine improves the early recovery and cognitive function in patients undergoing modified radical mastectomy: a prospective randomized controlled trial

Table 3 Adverse events in the perioperative period (n = 40 in each group)

	Control Group	S-ketamine Group	t /Z /X2	P-value
Length of PACU stay (min)	38.0 (30.0–40.0)	35.0 (30.0–40.0)	-0.353	0.726
Occurrence of PONV	11.0 (27.5%)	3.0 (7.5%)	5.541	0.019*
Occurrence of dizziness	3.0 (7.5%)	3.0 (7.5%)	0.000	1.000
Occurrence of agitation	6.0 (15.0%)	4.0 (10.0%)	0.457	0.499
Remedial analgesia	9.0 (22.5%)	2.0 (5.0%)	5.165	0.023*
Patient satisfaction score	8.0 (8.0–9.0)	9.0 (9.0–10.0)	4.959	< 0.001*

Data are presented as median (IQR) or number (percentage). *P < 0.05, compared with control group. Abbreviations: PACU, Post-anesthesia care unit; PONV, Postoperative nausea and vomiting

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