Robotic total knee arthroplasty for moderate to high-grade valgus knee deformity: technique and outcomes

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Table 4

Comparison of pre-operative and post-operative gaps (in mm) in the recruited patients (n = 24).

Comparison of gap	Median	IQR	Z-statistic	P-value
Extension
Medial
Pre-operative	20.00	4.00	−2.96	0.003*
Post-operative	19.00	1.00	−2.96	0.003*
Lateral
Pre-operative	15.00	1.75	−4.33	<0.001*
Post-operative	18.17	0.00	−4.33	<0.001*
Flexion
Medial
Pre-operative	18.00	2.00	−2.00	0.045*
Post-operative	18.00	1.00	−2.00	0.045*
Lateral
Pre-operative	14.00	2.75	−4.309	<0.001*
Post-operative	18.00	0.00	−4.309	<0.001*

Descriptive statistics were presented as the median (interquartile range, IQR). The Wilcoxon signed-rank test (Z-test) was used to compare the outcomes, with a p-value of <0.005 considered statistically significant.

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