表 3.

Comparison of operation time, amount of postoperative drainage, and the time of active flexion of the knee joint at 90° between two groups before and after operation (n=12, )

两组手术时间、术后引流量及术后膝关节主动屈曲达 90° 时间比较（n=12， ）

组别 Group	手术时间（min） Operation time (minutes)			术后引流量（mL） Amount of postoperative drainage (mL)			术侧膝关节主动屈曲达 90° 时间（d） Time of active flexion of the knee joint at 90° (days)
	一期 First-stage	二期 Second-stage		一期 First-stage	二期 Second-stage		一期 First-stage	二期 Second-stage
观察组 Observation group	71.8±10.7	58.8±7.3		175.2±83.9	98.4±36.1		4.7±0.8	2.4±0.4
对照组 Control group	76.2±11.2	69.6±8.4		166.0±86.5	152.6±82.8		5.2±1.1	4.8±1.1
统计值 Statistic	t=0.984 P=0.336	t=3.362 P=0.003		t=0.265 P=0.794	t=2.079 P=0.049		t=1.273 P=0.216	t=7.103 P=0.000