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

Table 2 Pre- and post-operative coronal parameters and their changes between two groups

Parameters	IGCA	Non-IGCA	t/χ2 value	P value
No. of patients	27	25
CBD
Preoperative	24.7 ± 20.3	17.4 ± 15.1	1.466	0.149^*
Postoperative	12.6 ± 6.4	18.3 ± 11.4	−1.364	0.179^*
Major Cobb angle
Preoperative	25.4 ± 14.1	23.2 ± 13.4	0.572	0.570^*
Postoperative	8.8 ± 7.5	9.1 ± 6.9	−0.196	0.845^*
Δ CBD	13.9 ± 18.6	−1.3 ± 14.2	3.274	0.002^*
Δ major Cobb angle	16.6 ± 10.8	14.1 ± 9.7	0.904	0.370
Imbalance: balance
Preoperative	15:12	8:17	2.920	0.087^#
Postoperative	3:24	12:13	8.606	0.003^#

Results are given as the number or the mean ± standard deviation (SD) unless otherwise stated
IGCA integrated global coronal aligner, CBD Coronal balance difference, PI-LL Pelvic incidence minus lumbar lordosis
^*independent samples of t test
^#Chi-square test

ISSN: 1471-2474