Table 9 Adjusted HRs (95 % CIs) for lung cancer mortality per 100 Bq/m3 mean county-level residential radon concentrations (LBL) at enrollment (1982) stratified by selected risk factors, effect modification multiplicative scale, follow-up 1982–1988, CPS-II cohort, United States [13]
From: Radon exposure and lung cancer: risk in nonsmokers among cohort studies
Characteristic | n | Lung cancer deaths | Fully adjusted HR (95Â % CI) | P |
|---|---|---|---|---|
Cigarette Smoking | ||||
 Never-Smoker | 375,087 | 271 | 0.77 (0.47–1.25) |  |
 Current | 152,033 | 1792 | 1.20 (1.00–1.44) |  |
 Former | 203,253 | 941 | 1.09 (0.84–1.41) | 0.66 |