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

Table 1 Comparison of Visual Analogy Scale levels among different groups after surgery, n = 30 for each group

Time point	Youth control group	Youth observation group	Elderly control group	Elderly observation group	t	P value
2 hours post-surgery	4.35 ± 0.87	3.55 ± 0.74	4.15 ± 0.85	3.45 ± 0.70	2.581	0.012
6 hours post-surgery	3.75 ± 0.82	2.85 ± 0.68	3.55 ± 0.80	2.75 ± 0.65	3.511	0.001
12 hours post-surgery	3.30 ± 0.75	2.60 ± 0.64	3.10 ± 0.78	2.50 ± 0.59	4.256	< 0.001
24 hours post-surgery	2.90 ± 0.70	2.20 ± 0.60	2.80 ± 0.73	2.05 ± 0.57	4.341	< 0.001
48 hours post-surgery	2.60 ± 0.65	2.00 ± 0.59	2.40 ± 0.66	1.90 ± 0.58	3.731	0.003

P < 0.05 indicated significant difference.