Coronal Imbalance after Selective Posterior Thoracic Fusion in Patients with Lenke 1 and 2 Adolescent Idiopathic Scoliosis
Table 4
Comparisons of postoperative radiological parameters by early postoperative decompensation in lumbar curve modifier B.
Early postoperative period
Final follow-up
Coronal Imbalance
Coronal balance
P value
Coronal Imbalance
Coronal balance
P value
(N=15)
(N=35)
(N=15)
(N=35)
PT curve (°)
13.8±6.9
10.6±9.4
0.206
14.6±7.3
11.3±11.0
0.256
MT curve (°)
15.3±10.5
10.9±9.8
0.135
16.3±12.4
13.2±8.8
0.293
TL/L curve (°)
19.5±9.8
12.6±6.9
0.004
13.5±7.8#
11.4±5.0
0.235
AVT-MT (mm)
3.5±7.1
2.7±6.5
0.681
4.3±8.2
3.6±9.3
0.788
AVT-TL/L (mm)
7.6±8.6
6.7±5.3
0.637
8.3±9.3
7.3 ±6.5
0.647
C7-CSVL (mm)
22.9±7.9
9.0±6.5
0.001
12.6±9.0#
8.8±7.6
0.110
UIV tilt (°)
5.4±6.7
4.9±4.5
0.746
6.0±7.7
5.3±6.5
0.727
LIV tilt (°)
7.6±9.8
5.7±6.5
0.399
8.3±7.6
6.1±8.0
0.337
LIV-CSVL (mm)
3.8±9.1
3.1±6.7
0.750
2.7±4.9
2.4±5.0
0.835
LIV disc angle (°)
0.3±1.5
0.1±2.1
0.720
0.5±3.4
0.2±4.4
0.801
Data represents mean and standard deviation. Negative means the measurement is located left to the reference line (CSVL). #p<0.05, when the parameters at the final follow-up are compared with those in early postoperative period. PT: proximal thoracic; MT: main thoracic; TL/L: thoracolumbar/lumbar; AVT: apical vertebral translation; CSVL: central sacral vertical line; UIV: upper instrumented vertebra; LIV: lower instrumented vertebra.
