. Author manuscript; available in PMC: 2020 May 28.

Published in final edited form as: J Occup Environ Med. 2016 Nov;58(11):1137–1143. doi: 10.1097/JOM.0000000000000878

Table 4.

Lung Cancer Relative Risks (OR) and 95% CI in Relation to Ever Employment as Firefighter by Smoking Status

Smoking status	Firefighter	Cases	Controls	OR	95% CI
Never smoker^*	Never	457	4,571	1.0	Reference
	Ever	2	27	0.60	0.14–2.58
Former smoker^**	Never	4,922	7,746	1.0	Reference
	Ever	25	50	0.75	0.45–1.26
Current smoker^***	Never	9,278	5,091	1.0	reference
	Ever	59	27	1.18	0.73–1.90

OR in never smokers is adjusted for study and age

^**

OR in former smokers is adjusted for study, age, cumulative cigarette smoking (pack-years) and time since quitting smoking

^***

OR in current smokers is adjusted for study, age, and cumulative cigarette smoking (pack-years)