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Table 2 Comparison of patient characteristic between DD and NDD groups

From: The preoperative predictors for subsequent degeneration in L5-S1 disc after long fusion arthrodesis terminating at L5 in patients with adult scoliosis: focus on spinopelvic parameters

Variables

Group DD (n = 36)

Group NDD (n = 31)

P

Age (year)

59.6 ± 8.3

58.8 ± 8.9

0.706a

Gender

  

0.355c

 Male

8

10

 

 Female

28

21

 

BMI (kg/m2)

22.95 ± 3.43

23.93 ± 2.61

0.207a

Instrumented vertebrae number

  

0.927c

 4–6

9

9

 

 7–9

23

19

 

 > 9

4

3

 

Follow-up period (year)

4.70 ± 1.67

5.02 ± 1.77

0.377b

Pelvic incidence (°)

48.53 ± 7.84

54.03 ± 7.89

0.006a

Pelvic tilt (°)

22. 53 ± 4.33

24.58 ± 4.27

0.058a

Sacral slope (°)

26.19 ± 6.38

29.13 ± 5.47

0.051a

Cobb angle (°)

46.11 ± 6.03

44.95 ± 7.92

0.402a

Sagittal vertical axis (cm)

6.65 ± 3.09

4.12 ± 2.67

0.001a

Coronal vertical axis (cm)

2.76 ± 1.22

2.35 ± 1.49

0.235a

Lumbar lordosis (°)

37.43 ± 8.70

35.84 ± 9.43

0.482a

Thoracic kyphosis (°)

37.23 ± 9.59

35.51 ± 8.86

0.457a

Thoracolumbar kyphosis (°)

11.53 ± 4.81

9.96 ± 4.03

0.162a

L5 oblique angle (°)

8.26 ± 2.38

7.51 ± 2.61

0.291a

Sacrum-femoral distance (cm)

6.76 ± 2.56

4.43 ± 2.13

< 0.001b

Preoperative radiographic score

0.81 ± 0.57

0.87 ± 0.49

0.583b

Radiographic score at last follow-up

1.83 ± 0.60

0.87 ± 0.49

< 0.001b

  1. The data in the table are presented as the mean ± SD. P < 0.05, significant correlation
  2. aIndependent t test
  3. bMann-Whitney U test
  4. cChi-square test