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Table 1 The distance and relative angle between aorta and vertebral body in different positions(mm/°, Mean±SD)

From: How to improve the safety of bicortical pedicle screw insertion in the thoracolumbar vertebrae: analysis base on three-dimensional CT reconstruction of patients in the prone position

level

AVD

∠AOY

Prone

Supine

P value

Prone

Supine

P value

T9

5.94 Â± 1.73

5.07 Â± 1.25

0.000*

19.47 Â± 10.49

32.07 Â± 11.33

0.000*

T10

5.93 Â± 1.86

4.65 Â± 1.50

0.000*

18.47 Â± 10.93

22.79 Â± 8.48

0.032*

T11

4.71 Â± 2.55

3.87 Â± 1.11

0.003*

11.85 Â± 8.60

16.19 Â± 8.40

0.000*

T12

3.39 Â± 0.99

3.18 Â± 0.68

0.091

14.16 Â± 6.84

14.83 Â± 6.98

0.412

L1

3.70 Â± 1.43

3.70 Â± 0.83

0.983

14.11 Â± 8.71

13.80 Â± 7.52

0.605

L2

4.09 Â± 1.58

4.61 Â± 1.98

0.001*

10.70 Â± 7.61

13.58 Â± 7.38

0.000*

L3

5.92 Â± 2.14

5.74 Â± 2.65

0.404

5.30 Â± 5.68

8.85 Â± 3.80

0.000*

  1. * Means the difference in data is statistically significant