Table 3. Comparison of VAS score differences by months.

* p<0.05 **p<0.001

	Group A (n=40) Median (Min-Max)	Group B (n=42) Median (Min-Max)	P -value (Between Groups)
At pre-injection	7 (4-9)	7 (4-10)	0.523
1st month	4 (2-7)	4 (1-8)	0.731
6th month	2 (0-7)	3 (1-8)	0.760
12th month	2 (0-7)	3 (0-8)	0.022*
24th month	4 (1-8)	6 (3-10)	0.00**
60th month	6 (2-9)	6 (3-10)	0.144