Effectiveness and Safety of Preoperative Halo Gravity Traction-Assisted Posterior Spinal Fusion Surgery for Severe and Rigid Scoliosis: A Comparative Matched-Cohort Study

Figure 5

Comparison of preoperative osteotomy planning grades before and after halo-gravity traction (HGT) and comparison of actual osteotomy grades performed in surgeries between the HGT group and the non-HGT group. (a) Proportional comparison heatmap of patient numbers between pre-HGT, post-HGT, and correction operation in the HGT group. (b) Histogram depicting the proportion of different osteotomy grades between pre-HGT, post-HGT, and correction operation in the HGT group. (c) Histogram depicting the proportion of different osteotomy grades between correction operations in the HGT group and the non-HGT group. ^∗stands for p value <0.05, ^∗∗∗ stands for p value <0.001.

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