Table ES-1
Estimated lifetime relative risk (LRR) of lung cancer for lifetime indoor exposure to radona
 
Exposureb Exposure-age-concentration model Exposure-age-duration model
Male Female Male Female
WLM/y Jhm—3/y Bqm—3 pCiL—1 WL Ever-
smoker		 Never-
smoker		 Ever-
smoker		 Never-
smoker		 Ever-
smoker		 Never-
smoker		 Ever-
smoker		 Never-
smoker
0.10 0.00035 25 0.7 0.003 1.081 1.194 1.089 1.206 1.054 1.130 1.059 1.137
0.19 0.00067 50 1.4 0.005 1.161 1.388 1.177 1.411 1.108 1.259 1.118 1.274
0.39 0.00137 100 2.7 0.011 1.318 1.775 1.352 1.821 1.214 1.518 1.235 1.547
0.58 0.00203 150 4.1 0.016 1.471 2.159 1.525 2.229 1.318 1.776 1.352 1.819
0.78 0.00273 200 5.4 0.022 1.619 2.542 1.694 2.637 1.420 2.033 1.466 2.091
1.56 0.00546 400 10.8 0.043 2.174 4.057 2.349 4.255 1.809 3.053 1.915 3.174
3.12 0.01092 800 21.6 0.086 3.120 7.008 3.549 7.440 2.507 5.058 2.760 5.317
 

aBased on a submultiplicative relationship between tobacco-smoking and radon.

bExposures are represented by concentrations in bequerels per cubic meter (Bqm—3), picocuries per liter (pCiL—1), or Working Levels (WL), assumed to be constant for home occupancy at the 70% level and 40% equilibrium between radon and its progeny, and also by joules-hours per cubic meter per year (Jhm—3/y) and Working Level Months per year (WLM/y). For definitions of these terms, see the Glossary at the end of this report.