Associations between various factors and rod deformation at the concave side (°) using multiple stepwise linear regression analysis.

<p>Associations between various factors and rod deformation at the concave side (°) using multiple stepwise linear regression analysis.</p

Implant rod angle of curvature at the concave and convex sides of the deformity.

<p>(<b>A</b>) θ1 and θ2 at the concave side of each patients. (<b>B</b>) θ1 and θ2 at the convex side of each patients. (<b>C</b>) Comparison between θ1 and θ2 at the concave side. (<b>D</b>) Comparison between θ1 and θ2 at the convex side. (<b>E</b>) Comparison between Δθ at the concave side and Δθ at the convex side.</p

Correlation analysis between rod deformation and variable in patients with rod deformation ≥14 ° at the concave side.

<p>Correlation analysis between rod deformation and variable in patients with rod deformation ≥14 ° at the concave side.</p

Rod angle before and after implantation.

<p>(<b>A</b>) Prior to implantation, the surgeon traced the rod shapes on paper. The angle between the proximal and distal tangential line was measured (θ1). (<b>B</b>) Postoperative implant rod geometry (θ2) was obtained after the surgical operation using computed tomography.</p