Table 1

Demographic, employment, smoking and reproductive history details of lung cancer cases and subcohort non-cases

	Cases		Non-cases
	N	(%)	N	(%)
Total	628	100	3185	100
Year of birth
1925–1929	246	39.2	934	29.3
1930–1934	223	35.5	917	28.8
1935–1939	72	11.5	367	11.5
1940–1944	24	3.8	163	5.1
1945–1949	26	4.1	282	8.9
1950–1954	24	3.8	322	10.1
1955–1958	13	2.1	200	6.3
Year first employed in STIB
Before 1945	49	7.8	211	6.6
1945–1949	153	24.4	668	21.0
1950–1954	81	12.9	321	10.1
1955–1959	148	23.6	611	19.2
1960–1964	77	12.3	395	12.4
1965–1969	57	9.1	391	12.3
1970 and after	63	10.0	588	18.5
Smoking status at baseline
Never	556	88.5	3040	95.4
Ever	72	11.5	145	4.6
Former smoker	7	1.1	26	0.8
Current smoker	65	10.4	119	3.7
Smoked <10 years	7	1.1	29	0.9
10 to <20 years	14	2.2	32	1.0
20 to <30 years	14	2.2	32	1.0
Smoked ≥30 years	37	5.9	52	1.6
Ever drink alcohol at baseline
No	516	82.2	2609	81.9
<Once/month	86	13.7	433	13.6
≥Once/month	26	4.1	143	4.5
Number of live births at baseline
None	34	5.4	124	3.9
1	79	12.6	751	23.5
2–3	256	40.8	1212	38.1
≥4	259	41.2	1098	34.5