Table 3.

Interclass correlation coefficient (ICC) between two observers at postoperative

	Intraclass correlation
	Robotic TKA	Conventional TKA
HKA axis	0.841 (0.788 to 0.882)	0.839 (0.784 to 0.880)
α	0.751 (0.658 to 0.819)	0.853 (0.796 to 0.894)
β	0.880 (0.839 to 0.911)	0.875 (0.831 to 0.907)
δ	0.903 (0.869 to 0.929)	0.922 (0.894 to 0.943)

The ICC between two observers was within the 95% confidence interval. < 0.5: poor, 0.50–0.75: moderate, 0.75–0.90: good, > 0.90: excellent

HKA hip-knee-ankle, α coronal inclination of the femoral component, β coronal inclination of the tibial component, δ sagittal inclination of the tibial component