Excess relative rate (ERR) of lung cancer mortality (circles), and 95% profile likelihood confidence intervals (lines), by windows of time since exposure to cumulative radon measured in WLM. PUMA study of male uranium miners.
ERR/100 WLM = Excess relative rate per 100 working level months. Cumulative radon exposure is lagged 5 years, adjusted via background stratification for study cohort, attained age, calendar period, and duration of employment in uranium mining.