Table 1.

Clinical and Radiographic Characteristics of SA and Non-SA Group.

	SA group (n = 18)	Non-SA group (n = 27)	P value
Age (years)	6.67 ± 2.66	9.11 ± 3.76	0.021
Gender			0.197
Male	10	20
Female	8	7
Follow-up time (years)	3.44 ± 1.65	4.70 ± 2.74	0.062
Length of fixed segments	4.11 ± 1.37	3.07 ± 0.83	0.003
Distal anchor			<0.001
Sacrum	10	27
Pelvis	8	0
Lumbar Cobb angle (°)
Preoperative	38.06 ± 7.78	25.40 ± 9.51	<0.001
Postoperative	15.47 ± 10.24	10.04 ± 4.53	0.046
Follow-up	25.18 ± 19.58	14.77 ± 9.53	0.022
CBD (mm)
Preoperative	19.22 ± 12.20	18.94 ± 13.52	0.944
Postoperative	22.24 ± 9.91	15.04 ± 7.71	0.009
Follow-up	26.97 ± 9.99	15.31 ± 10.46	0.001
Pelvic obliquity angle (°)
Preoperative	3.27 ± 1.71	3.29 ± 1.78	0.972
Postoperative	2.84 ± 1.50	2.76 ± 1.46	0.860
Follow-up	2.33 ± 1.16	2.85 ± 2.25	0.373
Complications
Rod fracture	3	0	-
Revision surgery	3	0	-

(SA = sacral agenesis, CBD = coronal balance distance).