Table 2

Relative risk of lung cancer according to radon exposure (kBq year/m3), external (SIR) and internal comparison

KBq year/m3Mean KBq year/m3Mean WLMPerson-yearsNo casesRR (SIR)95% CI (SIR)RR internal comparison95% CI internal comparison
00071171201.000.61 to 1.541
0–408.116.674029271.100.73 to 1.611.170.65 to 2.08
40–6551.5105.312869242.801.80 to 4.173.331.82 to 6.08
65–9578.0159.57187294.763.19 to 6.835.543.06 to 10.01
>95132.8271.64948224.272.68 to 6.475.102.68 to 9.69
  • RR, relative risk; SIR, standardised incidence ratio; WLM, working level months.