Research Article

The Reliability of Computer-Assisted Three-Dimensional Surgical Simulation of Posterior Osteotomies in Thoracolumbar Kyphosis Secondary to Ankylosing Spondylitis Patients

Table 3

Results of ICCs and Bland-Altman analysis for the angle changes in real and simulated osteotomies.

Type of osteotomyReal spineSimulationICC analysisBland-Altman analysis
ICC (95% CI)Mean biasLOA (95% CI)

PCO (°, )0.703 (0.511-0.829)-1.062-3.167-1.043
PSO (°, )0.754 (0.487-0.892)-1.052-7.499-5.394

PCO: posterior column osteotomy; PSO: pedicle subtraction osteotomy.