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Table 3 The distal femoral valgus angle in each DRR image and difference relative to the neutral flexion and rotation in valgus knees

From: Sagittal femoral bowing contributes to distal femoral valgus angle deviation in malrotated preoperative radiographs

 

IR 10

IR 5

NR

ER 5

ER 10

DFVA (deg) with neutral flexion

4.83 ± 1.60

5.11 ± 1.57

5.36 ± 1.60

5.57 ± 1.57

5.67 ± 1.55

Difference

-0.53 ± 0.39

-0.24 ± 0.33

0

0.21 ± 0.31

0.32 ± 0.33

DFVA (deg) with 10° flexion

4.86 ± 1.59

5.16 ± 1.56

5.46 ± 1.57

5.68 ± 1.59

5.81 ± 1.56

Difference

-0.50 ± 0.46

-0.20 ± 0.31

0.10 ± 0.26

0.32 ± 0.35

0.45 ± 0.39

P value

0.059

0.071

 < 0.001

 < 0.001

 < 0.001

  1. Values are given as the mean and standard deviation
  2. Abbreviations: DFVA Distal femoral valgus angle, IR Internal rotation, NR Neutral rotation, ER External rotation