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 7 Significant Correlations between several axial component alignment angles, KSS, and OKS

Author (year)	Measured angles	Scores^a	Significant Correlations^b
Inui (2020) [17]	RFC RTC TIR extension TIR flexion 90°	KSS KS KSS FS KOOS	TIR flexion 90° and KSS FS: -0.32* TIR flexion 90° and KOOS pain: -0.34*
Kamenaga (2018) [21]	Alpha Beta	KSS FS OKS OKS recovery	Alpha and KSS FS: -0.52* Alpha and OKS: -0.54* Alpha and OKS recovery: -0.55* Beta and KSS FS: -0.34* Beta and OKS: -0.49* Beta and OKS recovery: -0.52*
Ng (2020) [25]	Femoral ER Tibia ER TIR extension	KSS KS KSS FS OKS	Tibia ER and KSS KS: -0.1* Tibia ER and KSS FS: -0.13 Tibia ER and OKS: -0.16 TIR and OKS: -0.06*

Abbreviations: KSS Knee Society Score, OKS Oxford Knee Score, RFC rotational femoral component angle, RTC rotational tibia component angle, TIR tibia component internal rotation angle relative to the femoral component, Alpha angle between component and Akagi’s line, Beta angle between component and line perpendicular to surgical epicondylar axis (SEA), IR internal rotation, ER external rotation, SD standard deviation, ns: no statistically significant difference
^aScores at last follow-up
^bLinear regression analysis
^*p < 0.05, **p < 0.01