Table 4.

Complications and patient-reported outcomes.

Variable	Skeletally Immature (Risser 0 to 2)	Skeletally Mature (Risser 3 to 5)	P Value
Revisions, n (%)	0 (0%)	0 (0%)
Screw plowing, n (%)	1 (6%)	0 (0%)	0.27
Screw loosening, n (%)	0 (%)	0 (%)
Cord breakage
Number of breakages, n (%)	2 (13%)	2 (12%)	0.94
Survival time of breakages, mo, events	(24, 39)	(12, 42)
Survival time all, mo, median (range)	24 (24–39)	25 (12–42)	0.32
Correction complications
Overcorrection, n (%)	2 (13%)	0 (0%)	0.13
Overcorrection degree, median (range)	9 (2–16)	0
Loss of correction, n (%)	1 (6%)	4 (23%)	0.17
Loss of correction degree, median (range)	8 (8)	7.5 (6–11)	0.12
2-y follow-up Scoliosis Research Society Questionnaire Scores, median (range)
Activity	4.1 (3.6–4.4)	4.4 (3–5)	0.24
Pain	4.5 (3.7–5)	4.7 (3.3–5)	0.26
Image	4.3 (3.4–4.9)	4.4 (3.1–5)	0.44
Mental	4.4 (3.2–5)	4.7 (3.4–5)	0.46
Satisfaction	4.5 (3–5)	4.7 (3–5)	0.57
Average	4.3 (3.6–4.8)	4.5 (3.3–5)	0.30