Table 5.7

Lifetime Risk of Lung Cancer for Lifetime Exposure to 1Bq m-3 Calculated from the BEIR IV, NCI, and BEIR VI Lifetime Relative Risk Tables

 

Lifetime Lung Cancer Risk per Bq m-3 in Air (in Water)

Model

Men

Women

Population

BEIR IV (National Research Council 1988)

 

 

1.0 × 10-4 (1.0 × 108)

Lubin and others (1994)

 

 

1.2 × 10-4 (1.2 × 108)

BEIR VI (National Research Council 1999)

 

 

 

Ever-smokers

3.1 × 10-4 (3.1 × 10-8)

2.0 × 10-4 (2.0 × 10-8)

 

Never-smokers

0.59 × 10-4 (0.59 × 10-8)

0.40 × 10-4 (0.40 × 10-8)

 

Population weighted average of ever-smokers and never-smokers

 

 

1.6 × 10-4 (1.6 × 10-8)

models for exposure in homes derived directly from the mines is considered valid for predictive purposes (National Research Council 1999).

The population estimate, 1.6 × 10-4, for the lifetime risk of lung cancer for lifetime exposure in the home to 1 Bq 222Rn m-3 in air, as derived from BEIR VI, is the value adopted by this committee. It can be seen that the BEIR VI estimate of lifetime risk is higher than that for the domestic studies (see table 5.5) which support a lower risk estimate for 222Rn (table 5.7).



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