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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)PaP (adjust)b
Disease duration (yr)15.0 ± 7.0   
Sex,M/F91/327/30.130 
Age (yr)36.8 ± 9.634.4 ± 8.30.225 
PI (°)47.4 ± 7.543.2 ± 4.6< 0.001*0.003*
PT (°)38.6 ± 11.77.8 ± 3.2< 0.001*< 0.001*
SS (°)8.8 ± 10.235.4 ± 3.7< 0.001*< 0.001*
TK (°)53.9 ± 18.132.3 ± 6.2< 0.001*< 0.001*
TLK (°)33.3 ± 12.76.6 ± 5.0< 0.001*< 0.001*
LL (°)−5.4 ± 14.2−46.3 ± 6.4< 0.001*< 0.001*
SVA (mm)166.1 ± 58.10.6 ± 15.1< 0.001*< 0.001*
SPA(°)120.5 ± 15.2173.5 ± 1.1< 0.001*< 0.001*
SSA(°)77.8 ± 13.3126.9 ± 4.1< 0.001*< 0.001*
TPA (°)47.1 ± 12.54.0 ± 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)