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Table 3 Comparison of pre- and postoperative sagittal parameters and their changes between two groups (independent t test)

From: A novel integrated global coronal aligner helps prevent post-operative standing coronal imbalance in adult spinal deformity patients fused to pelvis: technical notes and preliminary results

  IGCA Non-IGCA t/χ2 value P value
Patient No. 27 25   
Thoracic kyphosis
 Preoperative 12.7 ± 13.3 14.1 ± 9.1 −0.097 0.923
 Postoperative 20.8 ± 9.3 21.5 ± 10.1 −0.263 0.793
PI-LL
 Preoperative 26.1 ± 17.9 24.3 ± 19.9 0.333 0.740
 Postoperative 6.5 ± 10.1 8.3 ± 10.2 −1.708 0.694
Pelvic tilt
 Preoperative 27.6 ± 13.4 26.1 ± 11.5 0.424 0.673
 Postoperative 16.9 ± 9.6 18.6 ± 9.4 −0.650 0.518
SVA
 Preoperative 73.5 ± 41.9 82.1 ± 56.0 −0.636 0.528
 Postoperative 32.1 ± 20.4 30.7 ± 16.6 0.270 0.788
 Δ thoracic kyphosis ‘-8.1 ± 8.9 ‘-6.5 ± 10.6 −0.577 0.567
 Δ PI-LL 19.8 ± 13.7 14.3 ± 13.6 1.441 0.156
 Δ pelvic tilt 10.8 ± 10.1 7.6 ± 8.8 1.199 0.236
 Δ SVA 41.4 ± 33.9 51.4 ± 48.4 −0.875 0.386
  1. Results are given as the number or the mean ± standard deviation (SD) unless otherwise stated
  2. IGCA Integrated global coronal aligner, PI-LL Pelvic incidence minus lumbar lordosis, SVA Sagittal vertical axis