Table 3.

Comparison of preoperative and postoperative VAS scores between the two groups ($\overline{x}$ ± s, points).

Group	N	Before operation	12 h after operation	24 h after operation	72 h after operation	7 d after operation
C group	25	4.59 ± 1.34	7.47 ± 1.25	6.59 ± 0.44	4.85 ± 0.52	2.84 ± 0.33
R group	25	4.58 ± 1.35	5.39 ± 1.35	3.58 ± 0.57	2.68 ± 0.63	1.38 ± 0.67
t		0.026	5.625	20.900	13.282	2.276
P		0.979	0.001	0.001	0.001	0.001