2021 Yes https://pubmed.ncbi.nlm.nih.gov/34315338/ Buonocore, Jonathan Europe Observational Teachers Elementary (K-5) Middle/Jr High (6-8) Ventilation rates Humidity Dust Voice disorder Teachers School buildings Work environment Indoor air Technical assessment Perceived Complaints Teachers with voice disorders reported significantly more complaints from indoor air than those without voice disorders. The results also indicated a possible connection between the technical assessment and voice disorders. After adjustment for sex, stress and asthma, the prevalence of voice disorders was 47% higher in teachers working in renovated buildings compared to those working in the non-problem buildings (aRR1.47; CI 95% 1.11–1.95). The prevalence of voice disorders was 28% higher among teachers working in buildings with problems compared to those working in non-problem buildings (aRR 1.28; 95% CI 0.99–1.64).