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Journal Article
Validation Studies
Validation of the secretion severity rating scale.
European Archives of Oto-rhino-laryngology 2016 October
Accumulation of secretions within the hypopharynx, aditus laryngis, and trachea is one characteristic of severe dysphagia and is of high clinical and therapeutic relevance. For the graduation of the secretion severity level, a secretion scale was provided by Murray et al. in 1996. The purpose of the study presented here is the validation of this scale by analyzing the intra-rater and inter-rater reliability as well as concurrent validity. For examination of reliability and validity, a reference standard was defined by two expert clinicians who reviewed 40 video recordings of fiberendoscopic swallowing evaluations, with 10 videos for each severity grade. These videos were rated and rerated independently and blinded by 4 ENT-residents with an interval of 4 weeks. Both the intra-rater (Kendall's τ > 0.847***) and inter-rater reliability (Kendall's W > 0.951***) were highly significant and can be considered good or very good. Correlation of the median of all ratings with the reference standard was close to the highest possible value 1 (τ = 0.984***). The scale was proved to be a reliable and valid instrument for graduation of one of the principal symptoms of oropharyngeal dysphagia and is recommended as an evidence-based instrument for standardized fiberoptic endoscopic evaluation of swallowing.
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