*: reference category for categorical variable. Number of observation n = 84. Countries was set as hierachical level (France, Germany, Italy, Spain, Sweden, Netherlands and United Kingdom) using a ran
**p<.01(two-tail test), *p<.05 (two-tail test), †p<.05 (one-tail test). T-values in parentheses. Multilevel models with clustering based on neighborhood.
Radon is a radioactive gas that enters homes through contact points with the ground.It is a carcinogen that is the primary cause of lung cancer in non-smokers. Radonlevels vary greatly from household
