Effect of dexmedetomidine-ropivacaine transversus abdominis plane block on analgesia and cognitive impairment risk in colorectal cancer surgery

Table 5 Comparison of adverse reactions between two groups, n (%)

Time point	Group	Nausea	Vomit	Headache	Hypotension	Local numbness	χ2	P value
6 hours after surgery	Observation	3 (5.00)	2/3.33	1 (1.67)	4 (6.67)	2 (3.33)	1.087	0.9
	Control	4 (6.67)	3/5.00	2 (3.33)	5 (8.33)	3 (5.00)
24 hours after surgery	Observation	2 (3.33)	1/1.67	0	2 (3.33)	1 (1.67)	2.066	0.733
	Control	3 (5.00)	2/3.33	1 (1.67)	3 (5.00)	2 (3.33)
48 hours after surgery	Observation	1 (1.67)	1/1.67	0	1 (1.67)	1 (1.67)	1.667	0.798
	Control	2 (3.33)	2/3.33	1 (1.67)	2 (3.33)	2 (3.33)

P < 0.05 indicated significant difference.