Table 3.

Comparison of VAS scores between the two groups [M (Q₂₅, Q₇₅)]

Time	Observation group (n = 30)	Control group (n = 30)	Z	P
Pre-surgery	6.5 (5, 9)	6 (4, 8)	0.404	0.687
1 day post-surgery	5.5 (5, 6)#	6 (4.75, 7)#	1.348	0.178
3 days post-surgery	4.5 (4, 6)#	5 (4.75, 7)#	1.992	0.046
5 days post-surgery	4 (3, 5)#	5 (4, 6)#	2.590	0.010
7 days post-surgery	3 (2, 4)#	4 (3, 5)#	2.850	0.004
15 days post-surgery	2 (1, 3)#	4 (2.75, 4)#	4.446	<0.001
30 days post-surgery	1.5 (1, 2)#	3 (2, 3)#	5.201	<0.001

^#compare to pre-surgery, P<0.05.

VAS: visual analog score.