Significant correlations between postoperative outcomes and various limb and component alignment strategies in medial unicompartmental knee arthroplasty: a systematic review

Journal of Experimental Orthopaedics

Table 5 Correlations between KSS, OKS and coronal component alignment intervals

Author (year)	Measured angles	Scores^a	Significant Correlations^b
Kamenaga (2018) [20]	AKI^c TOL^c TCH-I^d TCH-L^d	OKS OKS recovery	AKI and OKS: -0.34* AKI and OKS recovery: -0.4** TOL and OKS: -0.4* TOL and OKS recovery: -0.53** TCH-I: and OKS recovery: -0.46* TCH-L and OKS: -0.41* TCH-L and OKS recovery: -0.51**
Khow (2020) [23]	FCCA^c	KSS KS KSS FS OKS 2 years^e OKS 10 years^e	FCCA and OKS 2 years: 0.266** FCCA and OKS 10 years: 0.296*

Abbreviations: KSS Knee Society Score, OKS Oxford Knee Score, AKI ankle-knee-implant angle, TOL tibia component obliquity relative to the lateral compartment, TCH-I tibia component height relative to the intercondylar eminence, TCH-L tibia component height relative to the lateral joint, FCCA femoral component coronal angle, SD standard deviation, ns: no statistically significant difference
^aScores at last follow-up
^bLinear regression analysis
^cNegative angles are varus and positive angles are valgus
^dHigher values indicates a lower placement of the tibia component
^eHigher scores indicate worse outcome
^*p < 0.05, **p < 0.01