Combined lumbar muscle block and perioperative comprehensive patient-controlled intravenous analgesia with butorphanol in gynecological endoscopic surgery

Table 6 Comparison of related adverse reactions between the two groups, n (%)

Group	n	Nausea	Vomiting	Urinary retention	Dizziness	Drowsiness
Study group	60	3 (5.00)	1 (1.67)	0 (0.00)	1 (1.67)	1 (1.67)
Control group	60	11 (18.33)	2 (3.33)	2 (3.33)	7 (11.67)	3 (5.00)
t value		5.175	0.342	2.034	4.821	1.034
P value		0.023	0.559	0.154	0.028	0.309