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

Table 2 Comparison of visual analog scale scores of postoperative analgesia between the two groups (mean ± SD, points)

VAS scores	2 h after operation	4 h after operation	12 h after operation	24 h after operation	48 h after operation
At resting state
Study group (n = 60)	2.29 ± 0.59	2.78 ± 0.81	2.90 ± 0.78	2.45 ± 0.65	1.75 ± 0.63
Control group (n = 60)	2.15 ± 0.52	3.07 ± 0.85	3.31 ± 0.88	2.81 ± 0.74	1.90 ± 0.50
t value	1.379	-1.913	-2.701	-2.831	-1.445
P value	0.171	0.058	0.008	0.005	0.151
At cough state
Study group (n = 60)	2.50 ± 0.64	3.10 ± 0.75	3.08 ± 0.81	2.94 ± 0.86	2.26 ± 0.78
Control group (n = 60)	2.37 ± 0.59	3.54 ± 0.88	3.51 ± 0.89	3.12 ± 0.90	2.43 ± 0.83
t value	1.157	-2.948	-2.768	-1.120	-1.156
P value	0.250	0.004	0.007	0.265	0.250

VAS: Visual analog scale.