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Table 1 Patient demographics and screw position

From: Does a deep seated L5 vertebra position with respect to the iliac crests affect the accuracy of percutaneous pedicle screw placement at lumbosacral junction?

Variable

L5-S group

L5-NS group

P

Patient no.

34

20

-

 Male (%)

18 (52.9%)

8 (40.0%)

0.358

 Female (%)

16 (47.1%)

12 (60.0%)

 Mean age (y)

51.7 ± 12.7

46.6 ± 11.8

0.514

 BMI (kg/m2)

25.7 ± 6.7

26.5 ± 7.1

0.482

Screw no.

136

80

-

 Grade 0 (%)

101 (74.3%)

61 (76.3%)

0.886

 Grade 1 (%)

25 (18.4%)

14 (17.5%)

 Grade 2 (%)

9 (6.6%)

5 (6.3%)

 Grade 3 (%)

1 (0.7%)

0 (0.0%)