Abstract
Background
Technological advances in radiotherapy have allowed investigations into new methods to spare healthy tissue in those treated for head and neck cancer. This systematic review with meta‐analysis demonstrates the effect that radiation has on swallowing.
Methods
Selection and analysis of studies examining the effect of radiation to swallowing structures. A fixed effects meta‐analysis calculated the pooled proportions for select outcomes of dysphagia, common across many studies.
Results
The majority of the papers found a correlation between radiation dose to the swallowing structures and dysphagia, however a meta‐analysis found the studies carried a significant degree of heterogeneity. The appraisal demonstrates the need for large‐scale studies using a randomized design and instrumental dysphagia assessments.
Conclusions
Radiation dose to dysphagia and aspiration structures is correlated with incidence of dysphagia and aspiration. The variables in this population contribute to the heterogeneity within and cross studies and future studies should consider controlling for this.
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