Table 2.

Comparison of coronal plane change

	SMA group (n = 14)	Traditional group (n = 16)	P
Global balance (mm)
Preoperative	18.2 ± 3.3	17.6 ± 4.2	0.67
Final FU	8.5 ± 2.7	9.2 ± 2.4	0.46
Major curve Cobb angle (°)
Preoperative	92.6 ± 13.7	88.6 ± 14.6	0.45
Flexibility (%)	25.5 ± 7.3	29.3 ± 6.6	0.15
IMPO	29.4 ± 5.7	37.2 ± 7.3	0.003*
Correction rate (%)	68.4 ± 6.2	57.8 ± 9.8	0.002*
Final FU	32.1 ± 5.6	38.6 ± 6.8	0.009*
Apical vertebral translation (mm)
Preoperative	56.2 ± 16.7	52.3 ± 13.4	0.48
IMPO	18.6 ± 12.5	22.3 ± 15.6	0.45

IMPO immediate postoperation, FU follow-up

* Statistically significant if P < 0.05