Additional file 3 of Preoperative black line sign predicts progressive kyphosis after percutaneous kyphoplasty in osteoporotic vertebral compression fractures

Supplementary material 3: Supplementary Figure 3. Correlations between bone cement volume and VHL parameters in the NBLS and BLS groups.Scatterplots showing the relationship between bone cement volume and VHL improvement rate Postoperatively.Scatterplots showing the relationship between bone cement volume and VHL difference at 1-year follow-up. Each dot represents a treated vertebra. Lines represent fitted linear trends with 95% confidence bands. Spearman’s correlation coefficientsand corresponding P values for each group are shown within each panel. VHL: Vertebral height loss