Effectiveness and Safety of Preoperative Halo Gravity Traction-Assisted Posterior Spinal Fusion Surgery for Severe and Rigid Scoliosis: A Comparative Matched-Cohort Study

Table 1

Summary of demographic parameters and baseline parameters.

Variables	HGT group N = 27	Non-HGT group N = 47	value
Sex (male/female)	8/19	11/36	0.56
Levels of deformities (T/TL-L)	21/6	38/9	0.66
Type of scoliosis (CS/IS/NMS/SS)	15/7/3/2	25/16/4/2	0.85
Major curve	113.69 ± 26.30	111.94 ± 26.52	0.79
Flexibility	13.09 ± 9.24	13.02 ± 10.74	0.98
CVA	27.41 ± 16.78	22.56 ± 33.40	0.46
AVT	82.40 ± 34.50	73.77 ± 28.32	0.49
LL	61.75 ± 28.30	67.12 ± 17.84	0.32
TK	91.72 ± 41.64	77.75 ± 23.89	0.07
SVA	37.43 ± 25.23	28.56 ± 23.61	0.13

HGT: halo-gravity traction; CVA: coronal vertical axis; AVT: apical vertebral translation; LL: lumbar lordosis; TK: thoracic kyphosis; SVA: sagittal vertical axis; IS: idiopathic scoliosis; CS: congenital scoliosis; NMS: neuromuscular scoliosis; SS: syndromic scoliosis; T: thoracic curve; L: lumbar curve; TL: thoraciclumbar curve.