表 1-1.

组别 Group	ROM（°）
	术前 Preoperative	二期术后 15 d Fifteen days after the second-stage operation	二期术后 45 d Forty-five days after the second-stage operation	二期术后 6 个月 Six months after the second-stage operation
观察组 Observation group	81.7±5.2	96.8±6.6	110.5±10.4	130.2±6.1
对照组 Control group	83.3±4.9	90.3±8.3	96.1±7.8	114.6±8.5
统计值 Statistic	t=−0.770 P=0.449	t=2.135 P=0.045	t=3.878 P=0.001	t=5.227 P=0.000