Learning curve of robot-assisted total knee arthroplasty and its effects on implant position in asian patients: a prospective study

Table 2 Comparison of position errors among the three groups

Variable	Conventional TKA (n = 50)	Robot-arm assisted TKA (n = 50)		p-value ^b
Variable	Conventional TKA (n = 50)	Initial stage	Proficiency stage	p-value ^b
HKA angle (°) ^c	1.18 ± 2.06	0.87 ± 1.09	0.44 ± 1.36	0.165
Coronal femoral component (°) ^c	0.69 ± 1.48	0.55 ± 0.96	0.69 ± 1.10	0.918
Coronal tibial component (°) ^c	0.21 ± 1.54	0.19 ± 1.06	−0.07 ± 0.68	0.580
Sagittal femoral component (°) ^d	2.46 ± 2.17	1.94 ± 2.07	2.31 ± 2.53	0.057
Sagittal tibial component (°) ^d	3.72 ± 2.42	0.86 ± 0.82	0.84 ± 0.77	< 0.001
Femoral component rotation (°) ^e	−2.11 ± 1.58	1.62 ± 1.12	1.30 ± 0.83	< 0.001

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