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Table 4 Relative risk of lung cancer and fitted models, underground Newfoundland fluorspar miners, by cumulative radon progeny exposure and smoking status [6]

From: Radon exposure and lung cancer: risk in nonsmokers among cohort studies

Smoking status   Cumulative radon progeny exposure (WLM)
<500 500– < 1500 1500– < 2500 2500+
Non-current Deaths 6 7 4 2
RR 1.0 4.80 5.17 5.22
  1. The relative risk was adjusted for age and calendar period
  2. RR relative risk, WLM working level month