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Table 2 Statistical analysis of pre- and post-operative parameters

From: The relationship between changes of cervical sagittal alignment after anterior cervical discectomy and fusion and spino-pelvic sagittal alignment under roussouly classification: a four-year follow-up study

 

Average

Roussouly type I

Roussouly type II

Roussouly type III

Roussouly type IV

C2–C7 angle

     

 Pre-op.

9.61 ± 12.26

8.24 ± 8.66

7.90 ± 12.69

11.08 ± 13.83

9.42 ± 12.36

 Post-op.

11.25 ± 11.89*

9.51 ± 10.83

7.52 ± 11.96

13.05 ± 12.72

12.41 ± 11.18*

C0–C2 angle

     

 Pre-op.

20.42 ± 9.05

20.94 ± 9.23

20.42 ± 5.91

20.37 ± 10.51

19.93 ± 7.99

 Post-op.

21.25 ± 8.61

20.58 ± 8.72

21.54 ± 5.60

22.50 ± 10.55

19.02 ± 4.76

C0–C7 angle

     

 Pre-op.

29.89 ± 12.15

29.18 ± 9.06

28.32 ± 9.85

31.07 ± 14.11

29.35 ± 12.58

 Post-op.

32.33 ± 12.07*

30.09 ± 10.71

29.06 ± 8.37

35.09 ± 13.97*

31.43 ± 10.68

 EAM

     

 Pre-op.

5.74 ± 7.39

4.28 ± 6.04

5.19 ± 6.86

6.01 ± 8.00

7.34 ± 7.86

 Post-op.

1.63 ± 7.30*

−1.33 ± 7.67*

1.73 ± 8.66

2.68 ± 6.33*

2.67 ± 7.15*

 T1 slope

     

 Pre-op.

28.23 ± 9.69

27.74 ± 10.91

30.51 ± 6.24

29.74 ± 8.56

23.25 ± 11.67

 Post-op.

27.32 ± 8.50*

26.05 ± 7.00

29.29 ± 4.30

28.03 ± 9.81*

25.45 ± 9.39

 TK

     

 Pre-op.

39.00 ± 12.58

35.98 ± 14.11

32.41 ± 9.56

40.81 ± 11.50

43.71 ± 12.87

 Post-op.

35.83 ± 12.26*

32.93 ± 15.05*

26.83 ± 7.63*

36.88 ± 9.18*

44.04 ± 12.41

 LL

     

 Pre-op.

50.76 ± 11.13

43.81 ± 11.76

42.16 ± 9.36

53.01 ± 6.92

60.53 ± 9.62

 Post-op.

49.78 ± 10.28

45.42 ± 13.42

43.72 ± 5.50

50.20 ± 7.78*

58.61 ± 7.91

 PI

     

 Pre-op.

50.50 ± 11.03

41.24 ± 7.86

49.69 ± 9.90

52.84 ± 8.33

56.37 ± 13.84

 Post-op.

49.33 ± 8.95

41.82 ± 7.69

48.73 ± 7.57

51.69 ± 8.25

53.04 ± 8.12

 SS

     

 Pre-op.

37.30 ± 8.30

26.70 ± 4.99

33.53 ± 5.23

39.19 ± 3.44

48.05 ± 4.08

 Post-op.

36.84 ± 7.58

30.06 ± 5.55*

32.96 ± 4.63

37.53 ± 5.56*

45.99 ± 5.34

 SSA

     

 Pre-op.

129.26 ± 8.10

122.29 ± 6.97

122.43 ± 6.03

132.44 ± 4.06

135.57 ± 8.10

 Post-op.

128.54 ± 7.51

123.64 ± 8.32

125.13 ± 4.59*

129.57 ± 6.82*

134.52 ± 4.72

 SAIV

     

 Pre-op.

1.45 ± 3.64

1.92 ± 3.34

1.66 ± 2.55

1.31 ± 3.65

1.01 ± 4.81

 Post-op.

1.03 ± 3.73

1.24 ± 3.90

1.41 ± 2.12

0.83 ± 4.13

0.94 ± 3.84

 IAIV

     

 Pre-op.

4.24 ± 4.08

3.51 ± 7.20

5.92 ± 4.11

4.31 ± 2.70

2.66 ± 5.29

 Post-op.

3.39 ± 3.34*

2.97 ± 4.15

5.56 ± 4.72

3.28 ± 2.31

1.72 ± 3.51

  1. Comparisons between pre- and post-operative parameters were performed with the Wilcoxon signed-rank test
  2. Abbreviations: EAM external auditory meatus (EAM) tilt, TK thoracic kyphosis, LL lumbar lordosis, PI Pelvic incidence, SS sacral slope, SSA spinal sacral angles, SAIV superior adjacent inter-vertebral angle, IAIV inferior adjacent inter-vertebral angle, Pre-op. Pre-operation, Post-op. Post-operation
  3. * P < 0.05
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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