2021 Yes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7980605/ Finell, Eerika Europe Review Students Middle/Jr High (6-8) High School (9-12) Odor Stress/Anxiety Indoor air quality Class spirit Multilevel analysis Teacher-student relationships Indoor environmental problems Mold Dampness After the background variables were adjusted, schools' observed mould and dampness was not significantly related to neither student-perceived teacher-student relationships nor class spirit. However, our mediational models showed that there were significant indirect effects from schools' observed mould and dampness to outcome variables via school-level subjective IAQ:
a) in schools with mould and dampness, students reported significantly poorer subjective IAQ than in schools without;
b) the worse the subjective IAQ at school level, the worse the student-reported teacher-student relationships and class spirit