Table 3. Comparison of VAS score of HA injection from baseline to week 12.

VAS: visual analog scale, HA: hyaluronic acid, SD: standard deviation

VAS score	Mean ± SD	Paired t-test value	p-value
At week 0	8.1 ± 0.6	0	<0.0001
At week 3	6.2 ± 0.8	7.92	<0.0001
At week 6	4.8 ± 1.1	13.75	<0.0001
At week 9	4.1 ± 1.3	16	<0.0001
At week 12	2.8 ± 1.4	18.93	<0.0001