Finding F-1625

“After excluding the five houses with smoking, the median indoor concentration of PM2.5 decreased from 69.53 μg/m3 to 61.77 μg/m3, indoor PM2.5, Cd, As and Na became significantly lower than outdoor in these 14 houses, however, the indoor concentrations of Zn, Al and Ca were still not different from outdoor.”

Source Apportionment and Influencing Factor Analysis of Residential Indoor PM2.5 in… (2018). International journal of environmental research and public health. Page 8. CKB 7337

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Setting: home
Study design: source apportionment study of residential fine particles: indoor and outdoor fine particles and their elements measured at each house, with the houses where someone smokes analysed separately (class 4)
Effect: median
Caveat: 14 houses remain after the exclusion, and the study adds that the indoor fine particles then became significantly lower than outdoors

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.