Table 4.

Comparison of cold tolerance scores in four groups after operation

Group	N	One month post-op	Six month post-op	One year post-op	F1	P1
A	27	29.70±4.07*	20.33±6.37#,**	19.89±5.69#,**	27.813	0.000
B	23	30.48±3.69**	24.65±0.881#,**	24.52±0.951#,**	28.028	0.000
C	26	27.23±3.52	18.19±3.56#,**	14.88±3.44#,▲,**	86.261	0.000
D	30	23.57±3.49	9.80±2.80#	8.67±2.19#	335.248	0.000
F2	-	4.737	258.210	440.204
P2	-	0.004	0.000	0.000

(1) Comparison of cold tolerance scores at different time after the same operation:

^#indicates P1 < 0.01 compared to cold tolerance at one month postoperatively.

^▲indicates P1 < 0.01 compared to cold tolerance at six months postoperatively.

(2) Analysis of cold tolerance scores at the same postoperative time for different surgical approaches:

^*indicates P2 < 0.05 compared with group D;

^**indicates P2 < 0.01 compared with group D.