Prevalence of extra-articular tibia valga morphology in valgus knees and its implications for primary total knee arthroplasty

Table 2 Radiographic analysis of varus knees according to presence of tibia valga

Parameter	Tibia Valga (52/577 = 9%)			Non-Tibia Valga (525/577 = 91%)			p value
Parameter	Median	Q1–Q3	Min–Max	Median	Q1–Q3	Min–Max	p value
HKA	4.0	2.0–7.0	0.0–17.0	5.0	3.0–9.0	0.0–25.0	0.039
mLDFA	87.8	86.4–89.0	83.1–93.9	87.7	86.4–89.0	81.2–103	0.79
mMPTA	87.0	85.5–88.6	81.4–92.6	85.2	83.8–86.7	69.6–94.1	< 0.001
JLCA	4.3	2.8–5.8	0.2–10.0	3.9	2.2–5.5	0.0–11.1	0.23
CORA-tibia	− 3.0	− (2.3–3.9)	− (0.5–5.5)	0	0.0–0.0	0.0–4.2	< 0.001

Q1–Q3 Interquartile range, HKA Hip–knee–ankle, mLDFA mechanical lateral distal femoral angle (^o in valgus), mMPTA mechanical medial proximal tibial angle (^o in varus), JLCA joint line convergence angle, CORA-tibia centre of rotation angulation of tibia in varus. p < 0.05 was considered statistically significant

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