Table 2.

Descriptive Characteristics of the Male Study Participants by Employment Status as Firefighter

Characteristic		Firefighters (ISCO 5–81)				Non-Firefighters
		Cases		Controls		Cases		Controls
Category		No.	% or Mean(SD)	No.	% or Mean(SD)	No.	% or Mean(SD)	No.	% or Mean(SD)
Age	Mean (SD)	86	62.9 (8.4)	104	61.6 (10.7)	14,662	62.7 (9.0)	17,439	62.3 (9.5)
Study	AUT-Munich	19	22.1	13	12.5	2,639	18.0	2,682	15.4
	CAPUA	1	1.2	2	1.9	646	4.4	588	3.4
	EAGLE	3	3.5	3	2.9	1,516	10.3	1,599	9.2
	HdA	6	7.0	11	10.6	832	5.7	825	4.7
	HONG KONG	6	7.0	10	9.6	1,188	8.1	1,033	5.9
	ICARE	14	16.3	13	12.5	2,200	15.0	2,728	15.6
	INCO CEE	9	10.5	5	4.8	2,023	13.8	1,987	11.4
	INCO/LLP-UK	5	5.8	12	11.5	276	1.9	561	3.2
	LUCA	3	3.5	4	3.8	294	2.0	290	1.7
	LUCAS	4	4.6	12	11.5	997	6.8	2,265	13.0
	MONTREAL	9	10.5	4	3.8	702	4.8	890	5.1
	OCANZ	3	3.5	5	4.8	207	1.4	410	2.4
	TORONTO	2	2.3	4	3.8	193	1.3	355	2.0
	TURIN/VENETO	2	2.3	6	5.8	949	6.5	1,226	7.0
Age categorized	<45 years	2	2.3	7	6.7	516	3.5	896	5.1
	45–64 years	45	52.3	49	47.1	7,314	49.9	8,383	48.1
	65+ years	39	45.4	48	46.2	6,832	46.6	8,160	46.8
Smoking status	Never smoker	2	2.3	27	26.0	457	3.1	4,571	26.2
(any type of tobacco)	Former smoker	25	29.1	50	48.1	4,927	33.6	7,777	44.6
	Current smoker	59	68.6	27	26.0	9,278	63.3	5,091	29.2
Cigarette pack years	<10	4	4.8	12	15.6	722	5.1	2,852	22.2
(current and former	10–19	15	17.9	14	18.2	1,287	9.1	2,407	18.7
smokers)	20+	65	77.4	48	62.3	12,009	84.5	7,058	54.8
	Other tobacco	0	0	3	3.9	187	1.3	551	4.3
Years-since-quitting	2–9 years	11	44.0	9	18.0	2,160	43.8	1,649	21.2
smoking cigarettes	10–20 years	10	40.0	19	38.0	1,699	34.5	2,504	32.2
(former smokers)	21+ years	4	16.0	22	44.0	1,068	21.7	3,624	46.6
Employed in ‘List A’ job	Ever	12	14.0	14	13.5	2,083	14.2	1,588	9.1
Lung cancer cell type
Adenocarcinoma		24	27.9	-		3,832	26.1	-
Squamous cell carcinoma		34	39.5	-		5,938	40.5	-
Small cell carcinoma		15	17.4	-		2,263	15.4	-
Other/unspecified		13	15.1	-		2,629	17.9	-