Finding F-1630

“During the cold season, ground-floor apartments recorded an average radon concentration of 133.18 ± 125.09 Bq/m2 (95% CI 116.75–149.62), which was significantly higher than that of upper-floor units at 94.65 ± 80.52 Bq/m2 (95% CI 79.97–109.33) (t = 3.032, df = 341, p = 0.003).”

Seasonal variation and structural influences on indoor radon exposure in residential buildings of (2025). Sci Rep. Page 7. CKB 1410

Structure

Factor: Radon
Setting: apartment (cold season)
Study design: cross-sectional survey of apartments: indoor radon measured in the cold and the warm season and related to the floor level, the age of the building and the height above ground (class 4)
Effect: mean 94.65 (79.97–109.33)
Flags: unit-suspect
Caveat: the unit is printed as Bq/m2 throughout the paper, which cannot be a radon concentration; it is recorded 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.