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This epidemiological study compared the frequency and adverse effects of voice disorders in Brazilian teachers and nonteachers.A standardized interview/questionnaire was administered to 3,265 participants; 1,651 teachers; and 1,614 nonteachers recruited from all 27 Brazilian states.Prevalence of reporting a current voice disorder was 11.6% for teachers and 7.5% for nonteachers, respectively (χ ...
This study was designed to determine the occupational risk factors associated with voice disorders among schoolteachers, a high-risk population for developing voice problems.Telephone interviews were completed by 1243 teachers from Utah and Iowa. Response rates were 98% and 95%, respectively. Bivariate analyses were computed and assessed using chi-square test and Cochran-Mantel-Haenszel test, and...
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