Table 2.

Comparison of ABI between the two groups before and after intervention (x̅±s)

	Experimental group (n=41)	Control group (n=42)	t/χ2	P
Pre-operation	0.39±0.099	0.28±0.033	0.344	0.732
1 week after operation	0.84±0.035	0.87±0.025	0.528	0.600
3 months after operation	0.75±0.034	0.73±0.034	0.352	0.726
6 months after operation	0.70±0.039	0.68±0.031	0.820	0.415
12 months after operation	0.66±0.045	0.44±0.044	0.152	0.043

Note: Significant difference as P<0.05.