Esophageal dysphagia in neuromuscular disorder patients with validity and reliability study of the brief esophageal dysphagia questionnaire.

Esophageal dysphagia (ED) is often underestimated in neuromuscular disorders (NMD) and it is important to evaluate the esophageal phase of swallowing with an easy and rapid screening test. We aimed both to assess the prevalence of ED in NMD and to perform validity and reliability study of the brief easophageal dysphagia questionnaire (BEDQ) screening test in NMD patients. This prospective cross-sectional clinical study was performed on NMD patients. Demographic features and disease characteristics were recorded. Endoscopic evaluation for oropharyngeal dysphagia (OD) and high-resolution esophageal manometry for ED were performed. In addition, the BEDQ and the 10-item eating assessment tool (EAT-10) were used to all subjects. Cronbach's α and principle components factor analysis (PFCA) with varimax rotation were used for reliability. The Chicago Classification version 3 (CCv3) level (high-resolution esophageal manometry) and EAT-10 was used for validity. A total of 50 patients were included in the study. Thirty-four (68%) patients were diagnosed with myasthenia gravis and 16 (32%) patients were diagnosed with myopathy. Esophageal dysphagia according to the CCv3 was found in 33 (66%) of patients. While the Cronbach's α was excellent as 0.937 for test overall the T-BEDQ scale. The PCFA included all scale items and resulted in a single factor (eigenvalue = 5.72, 71.5%). The all BEDQ scores were demonstrated good correlation with EAT-10 score and very good correlation with CCv3 level. Evaluation of swallowing in patients with NMD should include not only the oropharyngeal phase of swallowing, but also esophageal phase. For this purpose, the BEDQ can be used as a rapid, valid, and reliable test for the evaluation of ED.