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Table 3 Comparison of sagittal alignment changes depending on preoperative SCA

From: Spino cranial angle as a predictor of loss of cervical lordosis after laminoplasty in patients with cervical myelopathy

 

Total

LS

MS

HS

Changes in SCA (°)

4.14 ± 6.49

6.13 ± 8.73

4.88 ± 5.02

0.57 ± 5.12

Changes in T1s (°)

− 1.80 ± 4.93

− 4.11 ± 5.23

− 1.58 ± 4.12

0.22 ± 5.33

Changes in cSVA (mm)

4.01 ± 6.54

7.92 ± 4.92

2.82 ± 6.47

2.16 ± 6.77

LOCL (°)

4.42 ± 3.96

8.09 ± 5.93

2.39 ± 3.20

2.00 ± 3.03

LOCL > 5° (N)

27.9%(19/68)

61.1%(11/18)

15.2%(5/33)

17.6%(3/17)

LOCL > 10° (N)

8.8%(6/68)

27.8%(5/18)

3.0%(1/33)

0%(0/17)

 

LS vs. MS

LS vs. HS

MS vs. HS

Changes in T1s (°)

0.064*

0.021*

0.193*

Changes in cSVA (mm)

0.003#

0.006#

0.894#

LOCL (°)

< 0.001#

0.001#

0.894*

LOCL > 5° (N)

0.006+

0.086

0.941

LOCL > 10° (N)

0.047

0.338

1.000

  1. SCA spino cranial angle, T1s T1-slope, cSVA C2–7 sagittal vertical axis, LOCL loss of cervical lordosis, LS low SCA, MS middle SCA, HS high SCA
  2. *Independent t-test
  3. #Mann–Whitney U test
  4. +Pearson Chi-square test
  5. Fisher’s Exact test
  6. Continuity Correction test