Time to Onset of Dysphagia Following Head and Neck Radiation.

The study relied on electronic medical record codes (ICD/CPT) to identify dysphagia, which may miss cases where patients did not seek care or where documentation was incomplete, potentially underestimating the true incidence. The analysis did not include data from instrumental swallowing exams (like FEES or MBSS), so the severity of dysphagia could not be characterized. The study was retrospective and single-center, limiting generalizability. The association between laryngeal dose and late dysphagia was a secondary finding and may be subject to chance or confounding factors not accounted for in this design. Patients with pre-existing dysphagia or those diagnosed during radiation were excluded from the late-onset counts, which defines the cohort but limits understanding of the full trajectory of swallowing decline.

The study was funded by the Medical University of South Carolina. No other conflicts of interest were declared.

Do not interpret the 16% late-onset rate as a guarantee that all patients will develop late dysphagia, nor should the laryngeal dose finding be treated as a definitive predictor. The study was retrospective and based on coding practices, meaning the true incidence of late dysphagia may be higher or lower depending on patient reporting and physician documentation. Additionally, the laryngeal dose association was a secondary analysis in a small subgroup, so it requires confirmation before changing clinical decision-making regarding radiation planning.