Table 1 The demographic and baseline characteristics of all patients (N = 33)

Age (mean ± SD) (years)

56.87 ± 7.77

Gender (n)

Male

23

Female

10

Body Mass Index (mean ± SD)

24.89 ± 3.01

Chronic comorbidity (n)

Hypertension

7

Diabetes mellitus

4

Direction of fragments migration (n) (percentage)

Upward

13 (39.4%)

Downward

20 (60.6%)

Location of fragments (n) (percentage)

L2 vertebra

2 (6.1%)

L3 vertebra

14 (42.4%)

L4 vertebra

16 (48.5%)

L5 vertebra

1 (3.0%)

Total

33 (100%)