Table 1 Basics Demographics Information and surgical characteristics of the Enrolled Patients

N=(38)

N=(44)

Gender (male:female)

22:16

26:18

0.913

Age (years)

60.13 ± 7.36

59.68 ± 6.94

0.778

BMI (kg/m 2)

24.96 ± 1.51

25.10 ± 1.25

0.650

Diagnosis

0.887

 Degenerative spondylolisthesis

19

22

 Central stenosis with segmental instability

5

7

 Isthmic spondylolisthesis

4

6

 lumbar disc herniation with spinal stenosis

10

9

Levels

0.642

 L3-4

0

1

 L4-5

28

30

 L5-S1

10

13

Operation time(mins)

154.23 ± 13.70

131.88 ± 15.02

< 0.001

Hospitalization costs (RMB)

66813.68 ± 3734.79

58968.95 ± 4757.98

< 0.001

Postoperative hospital stays (days)

5.78 ± 0.74

6.72 ± 1.12

< 0.001

Complications rates(%)

5.2%

4.5%

0.489