Finding · as stated by the study, recorded by Coridum · status verified-machine
Finding F-0693
“The overall geometric mean NO2 concentration in classrooms was 32 ppb (60.2 μg/m3), and the overall mean concentration of formaldehyde was 29 ppb (35.6 μg/m3) during school hours on the days of measurement.”
Structure
- Source
- Unvented heaters
- Factor
- Nitrogen dioxide (NO₂)
- Population
- school children
- Setting
- classroom, AU
- Study design
- double-blind, cluster-randomised crossover trial in Australian school classrooms: low-NOx unflued gas heaters against non-indoor-emitting flued gas heaters, NO2 and formaldehyde measured with passive diffusion badges, children recorded symptoms, medication use and lung function twice daily (class 3)
- Effect
- median 32
- Averaging time
- school hours on the measurement days
- Caveat
- geometric mean recorded under measure median
A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.