2019 Yes https://ehjournal.biomedcentral.com/articles/10.1186/s12940-019-0555-6#:~:text=Dose-response%20associations%20were%20found,but%20not%20with%20eye%20symptoms. Savelieva, Kateryna Europe Observational Exposure Study Students Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Ventilation rates Temperature Particulate Matter (PM) Odor Respiratory symptoms Vision Headaches Indoor environmental quality Symptom reporting Respiratory symptoms School Questionnaire Child health Several of the IEQ indicators were highly correlated and indicators were therefore mainly analyzed by combining them into a summary score and into latent classes. Dose-response associations were found between IEQ problems and higher reporting of respiratory and general symptoms among both primary and secondary school pupils. Some associations were also observed with lower respiratory and skin symptoms, but not with eye symptoms. The associations were somewhat stronger with symptoms related to the school environment compared to symptoms reported without such relation.