Table 1 Comparison of variables between subsidence and non-subsidence patients

Patients, n (%)

135

23

158

Mean age ± SD, years

54.38 ± 9.43

52.73 ± 9.12

54.15 ± 9.36

Females

62

9

71

Males

73

14

87

Smokers

21

3

24

Nonsmokers

114

20

134

Mean BMI ± SD, kg/m²

23.55 ± 2.77

23.62 ± 2.79

23.56 ± 2.76

Mean follow-up ± SD, month

12.14 ± 1.03

12.15 ± 1.29

12.15 ± 1.26

Disc level

 C3/4

12

1

13

 C4/5

22

3

25

 C5/6

84

15

99

 C6/7

17

4

20

Fusion

134

22

156

Lowest T-score, g/cm²

− 0.84 ± 1.38

− 1.62 ± 1.34

− 0.95 ± 1.40

95% CI

− 1.08 to − 0.61

− 2.20 to − 1.04

− 1.17 to − 0.73

Mean EBQ score ± SD

4.13 ± 1.14

5.38 ± 0.47

4.31 ± 1.15

95% CI

4.01–4.38

4.81–5.02

4.14–4.47

Mean segmental height loss (mm)

1.05 ± 0.47

2.82 ± 0.31

1.31 ± 0.66

95% CI

0.96–1.15

2.61–3.03

1.18–1.44