Finding F-1613

“We also found that the daily or weekly unit (1 μg/m3) increase in indoor PM2.5 levels could significantly decrease PEFR by 0.2% (95% confidence interval (CI) = 0.1 to 0.5) or PEFR by 1.2% (95% CI = 0.1 to 2.7) in asthmatic children, respectively.”

Kim et al. Association between Peak Expiratory Flow Rate and Exposure Level to Indoor PM2.5 in Asthmatic Children, Using Data from the Escort Intervention Study (2020). International journal of environmental research and public health. Page 1. CKB 7936

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Outcome: Lung function
Setting: home, KR
Study design: crossover randomised intervention in the homes of asthmatic children aged 6 to 12: portable air filtration switched on and off over seven weeks, with indoor fine particles measured continuously and peak expiratory flow rate recorded by the children (class 2)
Effect: difference 0.2 (0.1–0.5) per 1 µg/m3 %
Caveat: the outcome is the peak expiratory flow rate of the asthmatic children

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.