Table 1. Comparison of Preoperative Demographic Data.

Variable	Robotic group (n = 71)	Conventional group (n = 42)	p-value
HSS score	65.7 ± 7.7	65.4 ± 6.8	0.31
WOMAC score	80.8 ± 15.4	75.3 ± 10.2	0.67
VAS score	5.5 ± 3.5	5.2 ± 3.9	0.49
ROM	121.7 ± 16.0	122.0 ± 14.3	0.49
Age (yr)	66.3 ± 7.5	67.8 ± 6.5	0.78
Sex (male:female)	3:68	5:37	0.95
Varus deformity	9.0 ± 5.0	10.7 ± 6.7	0.71

Values are presented as mean ± standard deviation.

HSS: Hospital for Special Surgery, WOMAC: Western Ontario and McMaster University, VAS: visual analogue scale, ROM: range of motion.

Independent t-test. The p-values are of intergroup comparisons, with p < 0.05 indicating significance.