The Validation of the Italian Version of the Munich Swallowing Score (IT-MUCSS) Against the Fiberoptic Endoscopic Evaluation of Swallowing and Food Intake Modalities in Patients with Neurogenic Dysphagia: A Cross-Sectional Study

<b>Background/Objectives</b>: Oral intake and secretions need to be assessed separately, especially in patients with tracheal tubes, as they are vital for dysphagia treatment and may require different management strategies. This study aims to validate the Italian version of the Munich Swallowing Score (IT-MUCSS) by examining its content and construct validity in relation to the fiberoptic endoscopic evaluation of swallowing (FEES) and oral intake in adults with neurogenic dysphagia, as well as assessing intra- and inter-rater reliability. This tool is clinically and scientifically useful as it includes two subscales: IT-MUCSS-Saliva, which assesses saliva/secretion management and the presence of a tracheal tube, and IT-MUCSS-Alimentazione, which evaluates feeding methods. <b>Methods</b>: In this prospective cross-sectional study, a total of 50 dysphagic patients with a neurological diagnosis were recruited from a neuro-rehabilitation hospital and underwent both clinical and instrumental assessments. The main outcome measures included evaluating food and liquid intake using the Italian versions of the Functional Oral Intake Scale (FOIS-It) and the IT-MUCSS. Pharyngeal residues were assessed using the Yale Pharyngeal Residue Severity Rating Scale (IT-YPRSRS), and airway penetration/aspiration were evaluated using the Penetration-Aspiration Scale (PAS) during FEES. <b>Results</b>: The IT-MUCSS demonstrated excellent reproducibility (K = 0.91) and internal consistency (Cronbach's alpha = 0.72). Strong correlations were found between IT-MUCSS and the FOIS-It scale, indicating the effective assessment of dysphagia. Test-retest reliability was high (ICC = 0.96 for total score). Construct validity was confirmed through significant correlations with instrumental measures during FEES. <b>Conclusions</b>: The IT-MUCSS is a valid tool for assessing functional oral intake and the management of saliva/secretions, specifically in relation to the level of saliva/secretions management compared to FEES measures of swallowing safety and efficiency in patients with neurogenic dysphagia.