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Abstract
Purpose
The purpose of this study is to determine the ideal period of brace application for thoracolumbar (T10-L2) osteoporotic vertebral compression fracture (OVCF) based on the progression of the vertebral compression with passage of time and to evaluate the factors associated with progression of thoracolumbar OVCF, when treated conservatively.
Materials and Methods
This retrospective study included a total of 46 patients who were diagnosed with thoracolumbar OVCF and could be followed-up for at least 6 months. In this study, the increase of compression rate and the mean slope of compression rate per weeks were compared between two periods (from diagnosed date to 8 weeks and from 8 weeks to 6 months), as the standard point. Age, bone mineral density (BMD), osteoporosis treatment after injury, diabetes mellitus (DM) as underlying disease were also compared between two groups (setting up 15% as standard point of increase of compression rate, <15% and ≥15%). Statistical analyses were performed using the paired t-test to assess the increase of compression rate and using the linear mixed model to assess the mean slope change. The relationships between the factors and progression of compression were analyzed using t-test, chi-square test, and logistic regression analysis.
Results
The increase of compression rate was 13.03% and 1.97% in each period and the difference between those two periods was 11.06% (p=0.00). At 8 weeks of follow-up, the mean slope was reduced by 1.12 (p=0.00). No statistically significant difference in related factors was observed between two groups.
Figures and Tables
Fig. 1
Method for calculation of compression rate. a, c: anterior vertebral body height of upper and lower vertebra, b: anterior vertebral body height of fractured vertebra.
Table 1
Compression Rate (%) according to the Serial Follow-Up and Compression-Rate Progression on Initial to 8 Weeks and 8 Weeks to 6 Months (n=47)
Table 2
Difference of Compression-Rate Increase and Change of Mean Slopes between Initial to 8 Weeks and 8 Weeks to 6 Months
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