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Correlation between in-brace radiographic correction and short time brace results

Background and purpose

In-brace X-ray is considered a reliable check of brace efficacy [13]. The aim of this study was to correlate the in-brace correction with the short term results of treatment (6 months).

Materials and methods

Design: pre-post study.

Population: 41 consecutive adolescent girls with idiopathic scoliosis who were prescribed a brace treatment (39 thoracic curves, 37±12°; 16 thoracolumbar, 38±13°; 12 lumbar, 31±8°. Risser 0-3).

In-brace X-ray and 6 months treatment out of brace X-ray results were correlated, according to curve localization. The in-brace/out-of-brace ratio was calcutated, curves were grouped according to the Risser sign, the results (<10°,³10° out-of-brace), in-brace correction (<10°,³10°), the magnitude (<30°, 30°-45°, >45°).

Statistical analysis: Correlation Coefficient.


The in-brace/out-of-brace ratio varied according to localization of curve and Risser, achieving the best results for Thoracic curves (38-45%). The groups of Thoracolumbar and Lumbar had higher variability (17-65% and 17-40%). The correlation coefficient between in-brace correction and out of brace results was statistically significant: 0.85 for Thoracic curves, 0.64 thoracolumbar, 0.72 lumbar. Risser groups: 0.65-0.98 Thoracic, 0,78-0.90 Thoracolumbar, 0.94-0.98 Lumbar. For Results groups, the correlation was better for High results in lumbar and Low results for thoracolumbar, no differences for thoracic. Low in-brace correction had a low correlation coefficient for thoracic and lumbar curves. No differences for Magnitude.


The correction after 6 months of brace are 17-47% of the in-brace correction. The correlation between in-brace correction and short time results of brace is significant, range 0.64-0.98. The in-brace correction seems able to predict the short time results of treatment.


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This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zaina, F., Donzelli, S., Lusini, M. et al. Correlation between in-brace radiographic correction and short time brace results. Scoliosis 7 (Suppl 1), O27 (2012).

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