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Influence of non-traumatic thoracic and lumbar vertebral fractures on sagittal spine alignment assessed by radiation-free spinometry

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Abstract

Summary

Due to missing indications for specific diagnostics, the majority of non-symptomatic vertebral fractures are not diagnosed. This study shows the ability of radiation-free spinometry to assess sagittal spine parameters to raise suspicion for new non-traumatic thoracic and lumbar vertebral fractures and indicate specific diagnostics.

Introduction

The primary aim of this study was to investigate the accuracy of radiation-free spinometry to predict new non-traumatic vertebral fractures (VF) by the assessment of thoracic kyphosis (TK), lumbar lordosis (LL), and trunk inclination.

Methods

Three hundred sixty-one patients (278 females and 83 males; age, 67.0 ± 8.6 years) were enrolled. In 86 women and 24 men, at least one non-traumatic VF was confirmed by radiography, MRI, and/or CT. Spinometry (video rasterstereography) was used to assess TK, LL, and trunk inclination. Receiver operating characteristic (ROC) and multivariate logistic regression analyses were performed to test the influence of age, sex, number, location, and grade of fractures on sagittal spine alignment.

Results

TK, LL, and trunk inclination were associated with advancing age (p < 0.05). Patients with prevalent thoracic and lumbar VFs showed increased TK (p < 0.001), decreased LL (p < 0.001), and increased trunk inclination (p < 0.001) in comparison to patients without VFs. ROC analysis revealed that the combination of TK and LL presented with the best predictive accuracy to raise suspicion for new grade 2 or grade 3 VFs in the thoracic and the lumbar spine (AUC, 0.752–0.771). Odds ratio (OR) showed an increased risk for VFs with increased TK (OR, 1.05–1.11; p < 0.001) and LL (1.05–1.07; p < 0.001) in specified regions of interest. A TK <50° (sensitivity, 88–100 %; specificity, 23–25 %) and LL (78–92 %; 24–27 %) were considered as appropriate cutoffs for future screening.

Conclusion

Spinometry showed better predictive accuracy than historical height loss. Severe changes of TK and LL may help to raise suspicion of new VFs radiation-free and indicate proper diagnostics, such as radiographs, MRI, or CT.

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Authors and Affiliations

  1. Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Lottestr. 59, 22529, Hamburg, Germany

    M. Krause, S. Breer, B. Mohrmann, R. P. Marshall, M. Amling & F. Barvencik

  2. Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany

    E. Vettorazzi

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  1. M. Krause
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Correspondence to M. Amling.

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Authors M. Krause, S. Breer, and B. Mohrmann contributed equally to this work and therefore share first authorship.

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Krause, M., Breer, S., Mohrmann, B. et al. Influence of non-traumatic thoracic and lumbar vertebral fractures on sagittal spine alignment assessed by radiation-free spinometry. Osteoporos Int 24, 1859–1868 (2013). https://doi.org/10.1007/s00198-012-2156-x

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