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

Table 5 Simple linear regression of patient-reported outcome measures PROMS at 2 years after surgery (KSS total-post and WOMAC pain-post)

Variables	Simple linear regression
	KSS total-post			WOMAC pain-post
	β	95% CI	p	β	95% CI	p
Age (years)	−0.237	−0.726 to 0.252	0.339	0.055	−0.019 to 0.128	0.144
BMI (kg/m²)	0.223	−0.571 to 1.018	0.579	−0.066	−0.185 to 0.054	0.277
Sex	0.908	−4.609 to 6.425	0.745	−0.337	−1.168 to 0.494	0.424
Side	−0.919	−6.235 to 4.398	0.733	−0.341	−1.142 to 0.459	0.400
Tibial component coverage (mm)
Medial	−1.652	−2.723 to −0.581	0.003	0.187	0.022 to 0.352	0.026
Lateral	0.485	−0.831 to 1.802	0.467	−0.091	−0.289 to 0.108	0.366
Anterior	0.683	−0.931 to 2.298	0.403	0.003	−0.242 to 0.247	0.983
KSS score
KSS total-pre	0.244	0.132 to 0.356	< 0.001	−0.024	−0.042 to −0.006	0.008
WOMAC pain score
WOMACp-pre	−0.679	−2.094 to 0.736	0.344	−0.008	−0.222 to 0.207	0.943

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