Table 1.

Selected study population characteristics by lung cancer status and occupational exposure to PAH.

		Ever exposed to PAH				Never exposed to PAH
Characteristic	Category	Cases	%	Controls	%	Cases	%	Controls	%
Gender	Female	618	13.3	636	13.5	2,678	21.8	3,878	23.9
	Male	4,021	86.7	4,077	86.5	9,584	78.2	12,374	76.1
Age group	<45 years	184	4.0	320	6.8	531	4.3	1,051	6.5
	45–49 years	280	6.0	287	6.1	792	6.5	1,028	6.3
	50–54 years	545	11.7	497	10.5	1,269	10.3	1,638	10.1
	55–59 years	720	15.5	714	15.1	1,958	16.0	2,436	15.0
	60–64 years	896	19.3	850	18.0	2,303	18.8	2,904	17.98
	65–69 years	983	21.2	1,033	21.9	2,487	20.3	3,348	20.6
	70–74 years	783	16.9	789	16.7	2,182	17.8	3,058	18.8
	75+ years	248	5.3	223	4.7	740	6.0	789	4.9
Smoking	Median (±SD)	38.00	26.67	24.20	22.99	37.75	26.82	22.01	23.02
pack-years
Smoking status and	Never smoker	219	4.7	1,242	26.4	1,150	9.4	5,911	36.4
years-since-	26+	184	4.0	606	12.9	520	4.2	1948	12.0
quitting smoking	16–25	306	6.6	588	12.5	865	7.1	1,758	10.8
among former	8–15	441	9.5	485	10.3	1,090	8.9	1,413	8.7
Smokers	<7	557	12.0	355	7.5	1,469	12.0	1,067	6.6
	Current smoker	2,932	63.2	1,437	30.5	7,168	58.5	4,155	25.6
“List-A” job	Never employment	3,841	82.8	4,122	87.5	11,273	91.9	15,479	95.2
	Ever employment	798	17.2	591	12.5	989	8.1	773	4.8
Lung cancer	SqC	1,980	42.7			4,523	36.9
Subtype	SCLC	767	16.5			1,963	16.0
	AC	1,124	24.2			3,628	29.6
	LCC	223	4.8			587	4.8
	Other/unspecified	519	11.2			1,493	12.2
	Not available	26	0.6			68	0.6

Abbreviations: AC, adenocarcinoma; LCC, large-cell carcinoma; PAH, polycyclic aromatic hydrocarbons; SqC, squamous cell cancers; SCLC, small cell lung cancer.