. Author manuscript; available in PMC: 2022 Feb 1.

Published in final edited form as: Occup Environ Med. 2021 Aug 20;79(2):102–108. doi: 10.1136/oemed-2021-107392

Table 2:

Relative rates (RR) of lung cancer incidence among smokers and never smokers by categories of cumulative radon exposure (5-year lag) among male uranium miners in the Příbram region of the Czech Republic, 1977–1996

WLM Categories	Total lung cancer cases (n)	Smokers			Non-smokers

		Smoking cases (n)	Relative Rate (RR)	95%CI	Never smoking cases (n)	Relative Rate (RR)	95%CI
0 - <10	112	92	1 (ref)		20	1 (ref)
10 - <50	227	186	1.67	1.24, 2.26	41	1.27	0.71, 2.27
50 - <100	139	121	1.60	1.15, 2.23	18	0.93	0.47, 1.85
100 - <150	117	104	1.86	1.30, 2.66	13	0.88	0.42, 1.86
150 - <200	93	85	3.41	2.28, 5.09	8	1.55	0.61, 3.92
200+	164	143	3.56	2.50,5.09	21	1.79	0.90, 3.57

All models are adjusted for age, birth cohort, and smoking, and included statistical interaction terms between smoking status and categories of WLM. a. WLM = Working Level Months