. 2020 Jul 20;29(10):3299–3309. doi: 10.1007/s00167-020-06166-3

Table 5.

Ideal osteotomy level tolerating a mechanical lateral distal femoral angle (mLDFA) of ≥ 85° and a mechanical medial proximal tibial angle (mMPTA) of ≤ 95° (overcorrection) with regard to the amount of varus malalignment

Ideal osteotomy level	Varus malalignment (mFTA)
Ideal osteotomy level	Mild (3°–5°) (%)	Moderate (6°–8°) (%)	Severe (≥ 9°) (%)
Tibial	64^a	56^a	22
Femoral	11	4	0
Double-level	24	38	78^b
Uncorrectable	2	2	0

Values are shown as percentages per group

mFTA mechanical femorotibial angle

^aSignificant difference between 3°–5° and 6°–8° mFTA (p < 0.001) and between 3°–5° and ≥ 9° mFTA (p = 0.005) (Qui-square test followed by post hoc tests with Bonferroni correction)

^bSignificant difference compared to 3°–5° and 6°–8° (p < 0.001 and p = 0.001) (Qui-square test followed by post hoc tests with Bonferroni correction)