Table 1 Univariate analysis regarding risk factors for revision

Gender

0.695^$

 Male

88

8

80

 Female

121

13

108

Age (year)

55.19 ± 12.83

55.66 ± 11.11

0.582^&

BMI (kg/m²)

26.28 ± 2.14

26.39 ± 2.74

0.389^&

Smoke

39

5

34

0.523^$

Disc height(mm)

7.99 ± 1.97

8.25 ± 1.42

0.186^&

Moderate and severe foraminal Stenosis(%)

40

14 (66.7%)

73 (38.8%)

 < 0.01 ^$

Spinal Stenosis(%)

71

13 (61.9%)

86 (45.7%)

0.120 ^$

Internal fixation mode

0.352^$

 Stand Alone

69

10

59

 Lateral plating

31

3

28

 Cage with Fin device

62

6

56

 Posterior internal fixation

47

2

45

Bone quality

0.392^$

 Normal

130

10

120

 Osteopenia

54

6

48

 Osteoporosis

25

4

21