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Askari M, Torabinezhad F, Ghelichi L, Jalilevand N, Ebrahimipour M, Aghazadeh K. Validity and Reliability of the Persian Version of the Swallowing Outcomes After Laryngectomy Questionnaire. Func Disabil J 2026; 9 (1)
URL: http://fdj.iums.ac.ir/article-1-273-en.html

Background and Objectives: There are various tools to identify problems caused by swallowing disorders in people with total laryngectomy. In this study, the validity and reliability of the Persian version of the “swallowing outcomes after laryngectomy (SOAL) questionnaire” in laryngectomy patients were determined.
Methods: This cross-sectional and descriptive-analytical study was conducted on patients referred to hospitals of Tehran and Iran Universities of Medical Sciences. Sampling was done using a simple non-probability method and the sample size was 70 individuals. 
Results: Exploratory factor analysis showed an initial commonality of 1 for all items and an extracted commonality of more than 0.4 for all items, indicating the variables’ explanatory power by the items. In total, 5 factors exhibited high eigenvalues. The first factor (5.035) and the fifth factor (1.165) accounted for more than 73% of the total variance. The intra-class correlation coefficient (ICC) and Cronbach’s α values were 0.819, indicating a favorable internal reliability. Also, the test re-test reliability measurement using Cronbach’s α showed a significant value of 0.823. The results of the total item correlation indicated that all items, except for items 15, 16, and 17, had a correlation above 0.3 with the total score. 
Conclusion: Considering the findings related to validity and reliability, the time required to complete the questionnaire, the small number of questions, the clarity and simplicity of the questions, and the ease of scoring, which are considered to be the most important aspects of the practicality of the questionnaire, the SOAL Questionnaire is deemed a suitable tool for clinical settings.