From: Radon exposure and lung cancer: risk in nonsmokers among cohort studies
Interaction variable | Cases, n | Nonsmokers IRR (95Â % CI) | P |
---|---|---|---|
Sex | |||
 Men | 46 | 1.35 (0.44–4.11) | 0.52 |
 Women | 53 | 2.02 (0.70–5.76) |  |
NOx at front (ug/m3) | |||
  < 21.8 | 48 | 1.80 (0.60–5.42) | 0.92 |
  ≥ 21.8 | 51 | 1.68 (0.54–5.23) |  |
ETS | |||
 No | 34 | 1.19 (0.34–4.20) | 0.45 |
 Yes | 65 | 1.99 (0.74–5.33) |  |