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Pulmonary Function in Middle-Aged Patients With Idiopathic Scoliosis With Onset Before the Age of 10 Years

  • Long-Term Follow-Up Case Series
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Abstract

Study Design

Consecutive patients with idiopathic scoliosis diagnosed before age 10 attended a clinical follow-up at least 10 years after treatment.

Objectives

To evaluate the pulmonary function in adulthood after treatment with brace or surgery before maturity.

Summary of Background Data

Long-term studies of these patients have not been published.

Methods

One hundred twenty-four patients (69% of the original group) underwent radiography, spirometry, and answered symptom questionnaires. A total of 73 patients had spirometries before treatment enabling longitudinal evaluation. Overall, 68 braced only (BT) and 56 surgically treated (ST) were analyzed in detail. A population-based control group was used.

Results

At follow-up, the mean age was 41. 5 years and the mean curve size 36 degrees (26% of the curves >45 degrees). The full patient group had a significantly reduced pulmonary function (as measured by the forced vital capacity [FVC], percentage of predicted) compared with the control group, mean 85% versus 102% (p <. 0001). Both subgroups of BT and ST patients showed a significant reduction, more in the ST than the BT group (means 79% and 90%, respectively, p =. 0003). The most important risk factor for a low lung function at follow-up was a low initial FVC value. Initial curve size correlated with pulmonary function both before treatment and at follow-up. Most surgically treated patients, who had larger curves before treatment, did not improve their pulmonary function after surgery.

Conclusions

Both braced and surgically treated patients had reduced pulmonary function at the age of around 40 years. The pulmonary function did not worsen over time in most patients. There was no difference in terms of symptoms between patient groups and controls. Initial curve size was found to be of great importance for pulmonary function. Initial spirometry and follow-up in selected patients is important.

Level of Evidence

III.

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Authors and Affiliations

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Correspondence to Aina J. Danielsson MD, PhD.

Additional information

Author disclosures: AJD (none); LE (none); KLH (none).

Research Ethics Committee: the Human Research Ethics Committee at the Medical Faculty at Gothenburg University, Sweden, approved the study (no. 081/07).

Funding sources: Funds were received as total or partial support for the research in this article from the Gothenburg Medical Society, the Neubergh Foundations, and through “the Agreement concerning research and education of doctors.” No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.

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Danielsson, A.J., Ekerljung, L. & Hallerman, K.L. Pulmonary Function in Middle-Aged Patients With Idiopathic Scoliosis With Onset Before the Age of 10 Years. Spine Deform 3, 451–461 (2015). https://doi.org/10.1016/j.jspd.2015.07.007

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