Finding F-0622

“The results in Table 2 show a moderate linear correlation (r = 0.42) between lung carcinoma incidence among the population of different regions and the average radon concentration in dwellings.”

Todorova The Prevalence of Lung Carcinoma Among the Population in Bulgaria and Its Association with Radon Exposure in Residential Buildings (2025). Int J Environ Res Public Health. Page 7. CKB 1471

Structure

Factor: Radon
Outcome: Lung cancer
Population: regional populations
Setting: dwelling, BG
Study design: ecological analysis of lung carcinoma incidence in Bulgarian regions 2013-2022 against regional indoor radon indicators (mean concentration and the share of dwellings above 200 and 300 Bq/m3), Spearman and linear correlation (class 4)
Effect: other 0.42
Caveat: ecological correlation across regions, not an individual-level risk estimate; the sentence opens with a reference to Table 2 but states its own value

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.