The ED50 and ED95 of esketamine for preventing early postoperative pain in patients undergoing laparoscopic cholecystectomy: a prospective, double-blinded trial

Table 4 The condition of post-operative adverse reactions

Index	Group E(n = 27)	Group C(n = 27)	χ² value	P value
PONV, n (%)	3 (11.11%)	6 (22.22%)	1.200	0.273
Hallucinosis, n (%)	0	0	/	/
Dizziness, n (%)	2 (7.41%)	3 (11.11%)	0.220	0.639
Itching, n (%)	0	0	/	/
Nystagmus, n (%)	0	0	/	/
Nightmare, n (%)	0	0	/	/
Postoperative respiratory depression, n (%)	0	0	/	/

Notes: PONV, Postoperative Nausea and Vomiting. Data are expressed as number (percentage). Enumeration data is treated with the chi-square test

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