Effect of intraoperative injection of esketamine on postoperative analgesia and postoperative rehabilitation after cesarean section

Table 7 Comparison of the incidence of adverse reactions after intravenous injection of ketamine in three groups, n (%)

Adverse reaction	Administration time	Low-dose group (n = 97)	How-dose group (n = 97)	Control group (n = 98)	χ2 value	P value
Nausea & vomiting	0-2 h	2 (2.1)	2 (2.1)	3 (3.1)	0.278	0.870
Headache	0-2 h	0 (0)	2 (2.1)	0 (0)	4.048	0.132
Hallucination	0-2 h	2 (7.2)a	9 (9.3)a,b	0 (0)	8.949	0.011
Dizziness	0-2 h	7 (7.2)	7 (7.2)	2 (2.0)	3.368	0.186
Drowsiness	0-2 h	6 (10.3)a	17 (17.5)a,b	0 (0)	18.039	< 0.001
Diplopia	0-2 h	2 (8)a	9 (9.3)a,b	0 (0)	9.213	0.010
Shivering	0-2 h	5 (5.2)	3 (3.1)	6 (6.1)	1.022	0.600
Itching	0-2 h	0 (0)	3 (3.1)	2 (2.0)	2.851	0.240
Reaction delay	0-2 h	3 (3.1)	3 (3.1)	0 (0)	3.095	0.213

^aP < 0.05 compared with control group.

^bP < 0.05 compared with low-dose group.