Document Type
Article
Publication Date
2-19-2024
Abstract
Purpose
This study aimed to clarify the differences in spine and total body height growth and curve progression between Sanders maturation stage (SMS) 7A and 7B in patients with adolescent idiopathic scoliosis (AIS).
Methods
This retrospective case–control study involving patients with AIS at SMS 7 evaluated the differential gains in the spine (T1-S1) and total body height and curve progression between SMS 7A and 7B. A validated formula was used to calculate the corrected height, accounting for height loss due to scoliosis. A multivariable non-linear and logistic regression model was applied to assess the distinct growth and curve progression patterns between the SMS 7 subtypes, adjusting for potential confounders.
Results
A total of 231 AIS patients (83% girls, mean age 13.9 ± 1.2 years) were included, with follow-up averaging 3.0 years. Patients at SMS 7A exhibited larger gains in spine height (9.9 mm vs. 6.3 mm) and total body height (19.8 mm vs. 13.4 mm) compared with SMS 7B. These findings remained consistent even after adjustments for curve magnitude. Non-linear regression models showed continued spine and total body height increases plateauing after 2 years, significantly greater in SMS 7A. More SMS 7A patients had curve progression over 10°, with an adjusted odds ratio of 3.31.
Conclusion
This study revealed that patients staged SMS 7A exhibited more spine and total body growth and a greater incidence of substantial curve progression than those at 7B. These findings imply that delaying brace discontinuation until reaching 7B could be beneficial, particularly for those with larger curves.
Level of evidence
Level III (Case–control study).
Recommended Citation
Hori, Yusuke; Kaymaz, Burak; Almeida da Silva, Luiz Carlos; Rogers, Kenneth J.; Yorgova, Petya K.; Gabos, Peter G.; and Shah, MD, Suken, "Differences in Spine Growth Potential for Sanders Maturation Stages 7A and 7B Have Implications for Treatment of Idiopathic Scoliosis" (2024). Department of Orthopaedic Surgery Faculty Papers. Paper 233.
https://jdc.jefferson.edu/orthofp/233
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Language
English
Comments
This article is the author’s final published version in Spine Deformity, Volume 12, 2024, Pages 621-628.
The published version is available at https://doi.org/10.1007/s43390-024-00829-8. © The Author(s) 2024.
Publication made possible in part by support through a transformative agreementbetween Thomas Jefferson University and the publisher.