Finding F-0834

“One year later, in 2019, the mean CO levels remained steady for both groups at 4.8% (95% CI 4.1-5.5) and 6.1% (95% CI 5.1-7.1), respectively.”

Prospective Cohort Study on the Effect of an Intervention to Reduce Household Air Pollution Among Sudanese (2021). Journal of health & pollution. Page 4. CKB 8252

Structure

Source: Biomass fuel
Factor: Carbon monoxide (CO)
Population: women of the intervention group
Setting: home, SD (2019)
Study design: prospective cohort in Port Sudan, Sudan, 2016 to 2019: women who cooked indoors were offered a well-ventilated outdoor cooking shelter (rakoobah) and 24 weeks of household air pollution education, against a control group; carboxyhaemoglobin was measured by CO-oximetry in the women and in their children each year (class 3)
Effect: mean 4.8 (4.1–5.5)
Flags: implausible
Caveat: the paper calls this the CO level; it is carboxyhaemoglobin read by CO-oximetry, and a group mean this high sits in the range of severe poisoning, which pulse CO-oximetry is known to overstate - taken as printed

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.