表 4.

The circumference difference of calf at different time points in the two groups (n=47, , cm)

两组患者术后各时间点小腿周径差值比较（n=47， ，cm）

组别 Group	术后 2 h Two hours after operation	术后 8 h Eight hours after operation	术后 12 h Twelve hours after operation	术后 24 h Twenty-four hours after operation
试验组 Trial group	0.37±0.63	0.45±0.65	0.18±4.66	0.60±1.20
对照组 Control group	0.57±0.85	0.53±0.81	0.68±1.12	0.43±0.73
统计值 Statistic	t=1.266 P=0.209	t=0.573 P=0.568	t=1.241 P=0.281	t=0.892 P=0.375