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Table 1 Comparison of the spinopelvic parameters between AS patients and normal controls

From: Increasing pelvic incidence is associated with more global sagittal imbalance in ankylosing spondylitis with thoracolumbar kyphosis: an observational retrospective study of 94 cases

 

AS group (n = 94)

Control group (n = 30)

Pa

P (adjust)b

Disease duration (yr)

15.0 ± 7.0

   

Sex,M/F

91/3

27/3

0.130

 

Age (yr)

36.8 ± 9.6

34.4 ± 8.3

0.225

 

PI (°)

47.4 ± 7.5

43.2 ± 4.6

< 0.001*

0.003*

PT (°)

38.6 ± 11.7

7.8 ± 3.2

< 0.001*

< 0.001*

SS (°)

8.8 ± 10.2

35.4 ± 3.7

< 0.001*

< 0.001*

TK (°)

53.9 ± 18.1

32.3 ± 6.2

< 0.001*

< 0.001*

TLK (°)

33.3 ± 12.7

6.6 ± 5.0

< 0.001*

< 0.001*

LL (°)

−5.4 ± 14.2

−46.3 ± 6.4

< 0.001*

< 0.001*

SVA (mm)

166.1 ± 58.1

0.6 ± 15.1

< 0.001*

< 0.001*

SPA(°)

120.5 ± 15.2

173.5 ± 1.1

< 0.001*

< 0.001*

SSA(°)

77.8 ± 13.3

126.9 ± 4.1

< 0.001*

< 0.001*

TPA (°)

47.1 ± 12.5

4.0 ± 1.0

< 0.001*

< 0.001*

  1. AS ankylosing spondylitis; M male; F Female; PI Pelvic incidence; PT Pelvic tilt; SS Sacral slope; TK Thoracic kyphosis; TLK Thoracolumbar kyphosis; LL Lumbar lordosis; SVA Sagittal vertical axis; GK Global kyphosis; SPA spinopelvic angle; SSA spinosacral angle; TPA the first thoracic vertebra pelvic angle
  2. a Compared with independent sample t-test or chi-square test
  3. b Adjusted by multivariate ANOVA and Bonferroni post hoc correction
  4. *Statistically significant (P < 0.05)