Prediction of 222Rn in Danish dwellings using geology and house construction information from central databases.
A linear regression model has been developed for the prediction of indoor (222)Rn in Danish houses. The model provides proxy radon concentrations for about 21,000 houses in a Danish case-control study on the possible association between residential radon and childhood cancer (primarily leukaemia). The model was calibrated against radon measurements in 3116 houses. An independent dataset with 788 house measurements was used for model performance assessment. The model includes nine explanatory variables, of which the most important ones are house type and geology. All explanatory variables are available from central databases. The model was fitted to log-transformed radon concentrations and it has an R(2) of 40%. The uncertainty associated with individual predictions of (untransformed) radon concentrations is about a factor of 2.0 (one standard deviation). The comparison with the independent test data shows that the model makes sound predictions and that errors of radon predictions are only weakly correlated with the estimates themselves (R(2) = 10%).
Andersen
Claus E
CE
Risø National Laboratory, DK-4000 Roskilde, Denmark. claus.andersen@risoe.dk
Raaschou-Nielsen
Ole
O
Andersen
Helle Primdal
HP
Lind
Morten
M
Gravesen
Peter
P
Thomsen
Birthe L
BL
Ulbak
Kaare
K
D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D000704:Analysis of Variance; D016022:Case-Control Studies; D002648:Child; D003718:Denmark / Q000453:epidemiology; D055593:Geological Phenomena; D005844:Geology; D006798:Housing; D006801:Humans; D007938:Leukemia / Q000453:epidemiology / Q000209:etiology; D008962:Models, Theoretical; D009381:Neoplasms, Radiation-Induced / Q000517:prevention & control; D011829:Radiation Dosage; D011886:Radon / Q000032:analysis*
D000396:Air Pollutants, Radioactive; D011886:Radon