Prolonged tracheostomy is prone to induce chronic airway mucosal injury and tracheal cartilage degeneration, which not only elevates the risks of post-decannulation complications such as persistent fistula non-healing, airway stenosis and recurrent infections, but also impairs ventilatory, phonatory and deglutitive functions, thereby exerting a severe adverse impact on patients' prognosis and quality of life.Accordingly, the retrospective observational study aimed to characterize stoma healing time after decannulation, identify key predictive factors, and develop and validate a clinically useful prediction model. These findings will offer evidence-based guidance for future researchers in selecting appropriate modeling methodologies and provide a scientific foundation for the development of targeted clinical intervention and prevention strategies.