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Table 2 The distal femoral valgus angle in each DRR image and difference relative to the neutral flexion and rotation in varus 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 (degree) with neutral flexion

5.70 ± 1.57

6.07 ± 1.63

6.43 ± 1.63

6.68 ± 1.69

6.87 ± 1.73

Difference

-0.73 ± 0.40

-0.37 ± 0.25

0

0.24 ± 0.27

0.44 ± 0.38

DFVA (degree) with 10° flexion

5.78 ± 1.55

6.17 ± 1.62

6.52 ± 1.65

6.82 ± 1.71

7.03 ± 1.76

Difference

-0.65 ± 0.45

-0.26 ± 0.32

0.09 ± 0.24

0.39 ± 0.29

0.59 ± 0.43

P value

 < 0.001

 < 0.001

 < 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