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

Table 8 Association between over-hang and PROMS (KSS total-post and WOMAC pain-post) at 2 years after surgery

	Anatomically sized¹	Mild over-hang¹	Severe over-hang¹	P²	P³ (mild vs anatomically sized)	P³ (sever vs anatomically sized)	P³ (severe vs mild)
	Mean ± SD (range)			P²	P³ (mild vs anatomically sized)	P³ (sever vs anatomically sized)	P³ (severe vs mild)
Association between medial over-hang and PROMS 2 years after surgery
KSS total-post	183.93 ± 10.92 (127 to 196)	161.12 ± 8.37 (149 to 174)	150.67 ± 16.50 (137 to 169)	< 0.001	< 0.001	< 0.001	0.555
WOMAC pain-post	2.07 ± 1.55 (0 to 6)	5.29 ± 1.65 (3 to 8)	6.33 ± 2.08 (4 to 8)	< 0.001	< 0.001	< 0.001	0.261
Association between lateral over-hang and PROMS 2 years after surgery
KSS total-post	178.33 ± 14.82 (127 to 196)	177.71 ± 15.52 (149 to 197)	185.75 ± 7.18 (175 to 190)	0.605	0.989	0.599	0.602
WOMAC pain-post	2.77 ± 2.16 (0 to 8)	2.79 ± 2.22 (0 to 7)	2.25 ± 1.50 (1 to 4)	0.894	1.000	0.887	0.899
Association between anterior over-hang and PROMS 2 years after surgery
KSS total-post	177.86 ± 12.31 (127 to 194)	177.54 ± 13.80 (150 to 197)	192.50 ± 0.71 (192 to 193)	0.272	0.994	0.250	0.251
WOMAC pain-post	2.91 ± 1.90 (0 to 8)	3.42 ± 2.04 (0 to 8)	1.00 ± 1.41 (0 to 2)	0.193	0.535	0.361	0.213

SD standard deviation; PROMS patient-reported outcome measures; KSS score the Knee Society score; WOMAC score, the Western Ontario and McMaster Universities Osteoarthritis index score
¹Anatomically sized, 0 mm-1 mm; mild over-hang, 1 mm-3 mm; severe over-hang, ≥ 3 mm
²One-way ANOVA
³Tukey’s post hoc test or Games-Howell post hoc test

ISSN: 1749-799X