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Table 4 Classification of the alignment of tibial and femoral component on short knee films and full-length films

From: Using short knee radiographs to predict the coronal alignment after TKA: Is it an accurate proxy for HKA on full-length images?

Alignment on full-length film

Varus

Neutral

Valgus

Agreement rate (%)

aMPTA on short films

 Varus (aMPTA < 88°)

69

20

–

83.0

 Neutral (88° ≤ aMPTA ≤ 92°)

9

106

8

 

 Valgus (aMPTA > 92°)

–

1

10

 

aLDFA on short films

 Varus (aLDFA > 86°)

45

10

1

57.6

 Neutral (82° ≤ aLDFA ≤ 86°)

50

77

7

 

 Valgus (aLDFA < 82°)

5

17

11

 
  1. aMPTA anatomical medial proximal tibial angle, aLDFA anatomical lateral distal femoral angle