Table 2 Radiographic parameters of patients with SMA undergoing instrumentation and fusion

Major curve angle

Preoperative (°)

58.8 ± 18.6

69.8 ± 19.0

0.107

Postoperative (°)

22.4 ± 13.4

19.3 ± 12.5

0.491

Correction (°)

36.4 ± 8.4

50.5 ± 11.2

< 0.001*

Correction (%)

63.8 ± 11.7

74.1 ± 10.5

0.013*

2-year follow-up

31.1 ± 17.3

25.9 ± 14.2

0.347

Major curve progression (°)

8.7 ± 4.8

5.1 ± 2.9

0.011*

Pelvic tilt (°)

Preoperative (°)

10.7 ± 6.8

15.9 ± 9.6

0.092

Postoperative (°)

5.6 ± 3.5

6.7 ± 4.4

0.432

Correction (°)

5.1 ± 4.3

9.2 ± 7.3

0.073

Correction (%)

45.2 ± 19.2

55.8 ± 20.7

0.146

2-year follow-up

7.0 ± 4.3

8.2 ± 5.1

0.469

Pelvic tilt progression (°)

1.4 ± 1.2

1.5 ± 1.2

0.833

Coronal balance (cm)

Preoperative (°)

5.4 ± 2.8

5.2 ± 2.2

0.897

Postoperative (°)

2.6 ± 1.8

2.2 ± 0.9

0.474

Correction (°)

2.8 ± 1.9

3.0 ± 1.7

0.674

Correction (%)

50.8 ± 21.6

53.0 ± 17.8

0.756

2-year follow-up

3.1 ± 2.0

2.9 ± 1.1

0.657

Coronal balance progression (°)

0.5 ± 0.3

0.7 ± 0.4

0.355