Table 2.

Comparison of NRS scores between the two groups before and at different time points after operation.

Time	Hole group	Notch group	T	P
Before operation	6.24 ± 0.52	6.34 ± 0.72	−0.603	0.549
1 d	0.60 ± 0.50	0.52 ± 0.50	0.600	0.550
0.5 y	0.32 ± 0.75	0.59 ± 0.95	−1.134	0.262
1 y	0.60 ± 1.19	1.07 ± 1.44	−1.293	0.202
2 y	0.96 ± 1.37	1.69 ± 1.69	−1.723	0.091