Tibial component coverage affects tibial bone resorption and patient-reported outcome measures for patients following total knee arthroplasty

Table 4 Simple linear regression of tibial bone resorption at 2 years after surgery

Variables	Simple linear regression
	Tibial bone resorption (mm)
	Medial			Lateral			Anterior
	β	95% CI	p	β	95% CI	p	β	95% CI	p
Age (years)	0.004	−0.081 to 0.088	0.934	0.008	−0.082 to 0.097	0.866	0.053	−0.015 to 0.120	0.127
BMI (kg/m²)	0.135	0.000 to 0.269	0.050	−0.030	−0.175 to 0.115	0.685	−0.045	−0.156 to 0.065	0.418
Sex	−0.246	−1.197 to 0.706	0.610	−0.380	−1.385 to0.625	0.455	−0.252	−1.021 to 0.518	0.518
Side	0.043	−0.875 to 0.961	0.926	0.411	−0.557 to1.379	0.402	0.149	−0.593 to 0.891	0.691
Tibial component coverage (mm)
Medial	−0.303	−0.486 to − 0.119	0.001
Lateral				−0.263	−0.499 to −0.027	0.029
Anterior							−0.202	−0.424 to 0.021	0.076
KSS score
KSS total-pre	0.000	−0.021 to 0.021	0.990	−0.007	−0.029 to 0.016	0.557	0.004	−0.013 to 0.021	0.670
WOMAC pain score
WOMACp-pre	0.071	−0.174 to 0.316	0.567	0.149	−0.109 to 0.407	0.255	0.005	−0.193 to 0.204	0.957

CI confidence interval; BMI, body mass index; tibial component coverage, over-hang: positive value, under-hang: negative value; KSS score the Knee Society score; WOMAC score, the Western Ontario and McMaster Universities Osteoarthritis index score

ISSN: 1749-799X