表 4.

两组患者术前、术后足周径及变化量的比较

Comparison of preoperative, postoperative circumference of the foot and amount of change between the two groups

Group	Preoperative/cm, x±s	Postoperative/cm, x±s	Amount of change/cm, x±s
Observation group	22.40±1.06	22.39±1.13	-0.012±0.43
Control group	22.71±1.19	23.16±1.00	0.44±0.72
t	0.806	2.529	2.521
P	0.433	0.023	0.023