From: Radon exposure and lung cancer: risk in nonsmokers among cohort studies
Radon (Bq/m3) | All residences, IRR (95Â % CI) | ||
---|---|---|---|
Cases, n | Model 1 | Model 2 | |
Non-smoker | |||
  < 17.6 | 27 | 1.00 | 1.00 |
 17.6–39.5 | 24 | 0.91 (0.52–1.58) | 1.16 (0.63–2.13) |
 39.5–66.1 | 22 | 0.78 (0.44–1.37) | 1.25 (0.60–2.59) |
  > 66.1 | 26 | 0.85 (0.49–1.45) | 1.48 (0.68–3.20) |
Linear trend per 100 Bq/m3 | 99 | 0.82 (0.43–1.56) | 1.67 (0.69–4.04) |