Measurement method of sentence intelligibility in postoperative oral cancer patients

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The need to assess use of speech in everyday situations in postoperative cancer patients has become apparent in our clinical research.The purpose of this study was to establish the method for measuring sentence intelligibility in oral cancer speakers. Nineteen oral cancer patients were assessed using a sentence intelligibility test which was developed for this study. A task was designed to measure the success of the communication. A test consists of 30 questions containing 2 or 3 key words for understanding. Each speech sample was judged by 5 naivelisteners (dental school students) . The relation between sentence intelligibility and syllable intelligibility, or conversationintelligibility was also investigated.The results were as follows.1.It was clarified that the sentence intelligibility test developed had high validity.2.The significant correlation between syllable and sentence intelligibility was found. However, the score of sentence intelligibility was significantly higher than that of syllable intelligibility.It was suggested that the test developed here could evaluate the sentence intelligibility quantitatively and objectively. The results indicated the speech at sentence level in oral cancer speakers was considerable intelligible.