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  • Title: [Prevalence of voice disorders among educational professionals. Factors contributing to their appearance or their persistence].
    Author: Preciado JA, García Tapia R, Infante JC.
    Journal: Acta Otorrinolaringol Esp; 1998 Mar; 49(2):137-42. PubMed ID: 9650312.
    Abstract:
    A study was made of the prevalence of voice disorders and their risk factors in teaching professionals of Logroño, Spain. A prevalence and case-control study was made, including interviews, ENT examination, videostrobolaryngoscopy, perceptual evaluation of hoarseness, basic aerodynamic tests, the physical range of phonation, and a physical analysis of the acoustic signal. The prevalence of voice disorders among Logroño teachers was 17.7% (confidence interval: 12.1-25%). Nodular lesions (8.1%) were the most frequent pathology, followed by hyperfunctional dysphonia (4.1%), chronic laryngitis (2.7%), polyps (1.4%), hypofunctional dysphonia (0.7%), and submucous suffusion (0.7%). Voice disorders were more prevalent in women (19.3%) than in men (15.6%), and among teachers of the lowest grades: 36.4% in nursery schools, 25% in elementary school, and 20.8% in junior school. The width and depth of classrooms, larger number of students, longer classroom hours, and noise level were related with the frequency of voice disorders.
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