Iliac Tilt, Pelvic Tilt, Pubic-Sacral angle, Sagittal balance, Risser staging, Orthopedic surgery, RD701-811, Diseases of the musculoskeletal system, RC925-935

Abstract Objective This study aims to systematically validate the reliability and applicability of Iliac Tilt (IT) as a parameter for sagittal balance assessment, explore its relationship with traditional parameters such as Pelvic Tilt (PT) and Pubic-Sacral Angle (PSA), and analyze its performance across different stages of skeletal development. Methods A retrospective study was conducted with 118 healthy pediatric participants. Full-length sagittal radiographs were obtained using the advanced EOS imaging system, and relevant sagittal plane parameters were measured using standardized methods. Participants were grouped based on Risser staging, and statistical analyses, including one-way analysis of variance (ANOVA), Pearson correlation analysis, and linear regression, were performed. Results Iliac Tilt (IT) was significantly negatively correlated with Pelvic Tilt (PT) (r = -0.761, p