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Table 2 Thoracic cage parameters of two groups.

From: The influence of early thoracic fusion on the pulmonary function of patients with idiopathic scoliosis in the early period of the second growth peak with different Risser signs

Parameters Preoperative Postoperative Follow up P1 P2 P3
LR group (Risser≤2) T1-T12 235.6±16.3 257.2±14.5 258±14.1 0.000* 0.681 0.000*
SAL 92.5±3.1 94±3.3 95.0±3.7 0.144 0.247 0.727
MICD 213.0±15.9 214.9±16.6 221.9±15.0 0.393 0.002* 0.002*
APTD 143.7±18.6 155.3±17.5 162.9±18.6 0.001* 0.008* 0.000*
TSLD 74.9±14.7 72.5±13.1 73.1±14.1 0.142 0.829 0.441
HR group (Risser>2) T1-T12 244.7±20.4 263.8±22.6 259.1±13.8 0.000* 0.201 0.000*
SAL 92.7±3.5 94.7±4.1 96.1±4.2 0.079 0.773 0.104
MICD 221.2±16.8 220.5±16.1 221.7±14.4 0.700 0.107 0.574
APTD 147.7±20.0 155.0±14.5 163.8±15.1 0.047* 0.007* 0.000*
TSLD 77.7±15.6 75.7±14.7 74.2±13.5 0.304 0.370 0.052
  1. LR low Risser sign, HR high Risser sign, T1-T12 the straight-line distance between the midpoint of the upper endplate at T1 and the midpoint of the lower endplate at T12, SAL, the ratio of the distance between the concave side and the convex side of the lateral curvature from the first costal apex to the highest point of the diaphragm, MICD the maximum linear distance between the medial margin of the ribs on the coronal plane, APTD the distance between anterior chest wall and the anterior border of the vertebral body through the highest point of the diaphragm on the sagittal plane, TSLD the distance between the highest point of the diaphragm and the highest point of the chest on the sagittal plane, P1 postoperative compared with preoperative values, P2 postoperative compared with follow-up values, P3 follow-up compared with preoperative values
  2. *p < 0.05 was considered significant