Table 1 Demographic data of patients in the two groups

Number of patients

88

52

36

Age (years)

59.83 ± 9.08

58.81 ± 9.57

61.31 ± 8.22

0.206

Gender (male/female)

32/56

18/34

14/22

0.682

BMD (T-score)

−1.89 ± 0.58

− 1.92 ± 0.61

−1.85 ± 0.55

0.568

Surgical segment (n)

L3-L4

7

4

3

0.921

L4-L5

34

21

13

L5-S1

47

27

20

LOS (days)

13.11 ± 2.37

12.85 ± 2.52

13.50 ± 2.12

0.205

Follow-up (months)

24.33 ± 6.27

23.29 ± 6.74

25.83 ± 5.26

0.061