Table 2.

Preoperative static and dynamic measurements for the early and late groups. Negative signs indicate plantarflexion or knee/hip extension

	Early (n = 20)	Late (n = 14)	p-value*
Physical exam, ° (sd)
Knee extension	5.7 (4.6)	4.1 (4.1)	0.29
Straight leg raise	61.0 (7.5)	66.8 (6.7)	0.03
Popliteal angle	46.5 (12.4)	37.5 (14.4)	0.06
Knee flexion (prone)	138.0 (10.3)	145.7 (3.9)	0.24
Hip flexion	110.0 (9.0)	119.6 (7.2)	0.012
Dorsiflexion with knee flexed	−3.3 (13.2)	3.6 (8.6)	0.10
Dorsiflexion with knee extended	−7.8 (13.7)	−5.0 (6.5)	0.49
Kinematics, ° (sd)
Minimum knee flexion in stance	−10.1 (5.6)	−3.6 (3.8)	< 0.001
Maximum dorsiflexion in stance	−6.3 (16.3)	−2.2 (11.8)	0.43
Average pelvic tilt in stance	20.5 (6.2)	23.4 (6.5)	0.21
Minimum hip flexion	−0.7 (10.9)	0.04 (6.9)	0.82

^*p-value of paired t-test (two-tailed) is reported.