Table 5.

The change of alignment and length among different lengthening nails.

	ISKD N = 35		PRECICE1 N = 34		PRECICE2 N = 46
	Femur	Tibia	Femur	Tibia	Femur	Tibia
The change of femorotibial angle (°)∗	−0.3 (−3 to 3.2)	−1.7 (−3 to 3.2)	−1.1 (−4 to 0.7)	−5.1 (−8.8 to −3.2)	0 (−3.8 to 3.2)	−2.8 (2.1 to −6.7)
The change of sagittal alignment (°)∗∗	−0.3 (−2 to 1)	0.4 (0 to 1)	−0.5 (−2 to 1)	0 (0 to 0.5)	0 (−2 to 4)	0 (0 to 0.5)
The differences between planned and actual length (mm)	−2 (−4 to 3)	2 (−3 to 3)	−1 (−3 to 2)	1 (−2 to 3)	0 (−2 to 3)	−2 (−2 to 3)

^∗+ means varus and − means valgus alignment; ^∗∗+ means flexion and − means extension alignment.