Table 4.

Comparison of VAS scores and joint flexion and extension activities between the two groups (x̅ ± sd)

Group	Control group (n=43)	Research group (n=43)	t	P
VAS score (scores)
At the time of enrollment	6.13±1.29	6.38±1.37	0.871	0.386
12 months after enrollment	4.06±0.95***	2.10±0.64***	11.220	<0.001
Joint flexion and extension (°)
At the time of enrollment	103.64±19.94	102.67±20.18	0.224	0.823
12 months after enrollment	116.67±21.28**	126.78±22.37***	2.147	0.035

Note: Compared with this group when entering the group;

^**P<0.01;

^***P<0.001.