Do hypokyphotic adolescent idiopathic scoliosis patients treated with Ponte osteotomy obtain a better clinical efficacy? A preliminary retrospective study

Table 4 Radiographic parameters comparison among preoperative and postoperative follow-up in control group

Parameters	Preoperative	Immediate postoperative	3 month postoperative	1 year postoperative	2 year postoperative	Pre versus Im-post	Im-post versus 3 m-post	3 m-post versus 1y-post	1y-post versus 2y-post
PT (°)	27.00 ± 3.70	14.10 ± 2.72	14.28 ± 2.41	14.80 ± 2.29	15.25 ± 2.17	< 0.001	0.636	0.136	0.155
MT (°)	50.03 ± 4.88	18.83 ± 4.01	19.38 ± 3.51	19.88 ± 3.08	20.33 ± 3.75	< 0.001	0.086	0.074	0.186
TL/L (°)	26.93 ± 3.23	12.55 ± 2.87	10.30 ± 2.86	8.93 ± 3.09	8.38 ± 2.92	< 0.001	0.007	0.017	0.083
CB (mm)	− 3.85 ± 15.24	− 9.90 ± 17.23	− 5.78 ± 10.92	− 5.33 ± 9.76	− 5.95 ± 9.57	0.001	0.009	0.473	0.259
RSH (mm)	− 5.58 ± 12.47	− 4.48 ± 13.08	− 2.95 ± 9.26	− 2.85 ± 9.21	− 3.10 ± 7.76	0.456	0.218	0.847	0.609
CSA (°)	3.08 ± 9.77	2.58 ± 9.24	1.33 ± 8.68	0.15 ± 9.10	0.40 ± 8.96	0.323	0.040	0.048	0.598
TK (°)	6.45 ± 2.95	20.00 ± 2.84	19.18 ± 2.45	19.55 ± 2.20	19.93 ± 2.38	< 0.001	0.044	0.408	0.319
LL (°)	− 39.58 ± 5.11	− 39.48 ± 9.62	− 41.15 ± 7.90	− 43.03 ± 7.93	− 40.25 ± 8.92	< 0.001	0.590	0.376	0.577
SVA (mm)	− 17.18 ± 12.22	− 15.73 ± 10.11	− 11.15 ± 8.41	− 9.43 ± 6.90	− 10.18 ± 9.54	0.680	< 0.001	0.124	0.259

PT proximal thoracic, MT main thoracic, TL/L thoracolumbar/lumbar, CB coronal balance, RSH radiographic shoulder height, CSA cervical sagittal alignment, TK thoracic kyphosis, LL lumbar lordosis, SVA sagittal vertical axis
Statistically significant values were bolded

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