Are Occupational Voice Disorders Accurately Measured? A Systematic Review of Prevalence and Methodologies in Schoolteachers to Report Voice Disorders.

Purpose: Different measuring instruments have been described to determine the prevalence of voice disorders in schoolteachers. However, the heterogeneity of prevalence figures has made it difficult in determining the impact of voice disorders in this group. This investigation aims to review and identify scientific evidence of methodological analysis of voice disorders in teachers, the relevance of measuring instruments, the prevalence of dysphonia, and the impact on the development of vocal health prevention programs.