Table 4 Follow-up data of the imbalanced group

Main curve (°)

17.0 ± 7.2

16.9 ± 8.3

0.894

Kyphosis (°)

0.0 ± 10.7

0.3 ± 12.6

0.975

Coronal balance (mm)

44.6 ± 12.9

12.6 ± 9.6

0.002

Instrumentation mass inclination (°)

10.3 ± 3.6

4.7 ± 3.4

< 0.001

UIV translation

35.4 ± 6.9

16.3 ± 8.5

0.002

UIV disc angle

1.6 ± 1.5

5.1 ± 5.1

0.095

LIV tilt

8.3 ± 7.0

1.0 ± 7.6

0.008

Ratio of CBD < 3 cm

–

100%

–

△UIV translation / △CBD (%)

–

63.3 ± 36.2

–