Highlights ■ Observer experience improves radiographic measurement reliability. ■ Spine surgeons and radiologists exhibited the highest intra-class correlation coefficients. ■ The cervical sagittal vertical axis showed the greatest inter-observer variability. ■ Standardized training may enhance measurement consistency. ABSTRACT Objective: To assess the intra- and inter-observer reliabilities of cervical sagittal radiographic measurements performed by evaluators with varying levels of clinical experience. Methods: This study analyzed lateral cervical radiographs from 14 patients who had undergone single-level anterior cervical discectomy and fusion. Four […]