Table 3.

RR of lung cancer mortality 1959–1996 and diesel fraction weighted cumulative years of work in an engineer or conductor job group (years of diesel exposure) stratified by year of hire (1939–1944 and 1945–1949). No lag and 5-year lag models are presented, adjusting for age, work in any shop category, years of employment and time since last worked as time dependent covariates.

				Years of Work as Engineer or Conductor
Hire Date	Lag Model		Not Exposed	0-<10	10-<15	15-<20	20-<25	≥25
1939–1944	No Lag	Cases	687	136	296	475	603	417
		Person years	234,808	58,841	136,418	135,907	132,885	93,717
		RR	ref	1.19	1.30	1.42	1.30	1.15
		95% CI		0.98–1.45	1.12–1.50	1.26–1.60	1.16–1.46	1.00–1.32
	5yr Lag	Cases	687	211	330	454	577	355
		Person years	236,322	157,192	120,396	111,181	101,083	66,403
		RR	ref	1.19	1.28	1.37	1.37	1.16
		95% CI		1.00–1.41	1.11–1.47	1.21–1.55	1.21–1.54	1.00–1.34
1945–1949	No Lag	Cases	229	20	50	107	125	142
		Person years	97,852	13,639	29,221	30,301	28,267	27,876
		RR	ref	1.08	1.47	1.85	1.80	1.72
		95% CI		0.68–1.73	1.07–2.02	1.46–2.34	1.43–2.26	1.36–2.17
	5yr Lag	Cases	229	32	66	103	119	124
		Person years	98,292	35,541	26,434	25,313	21,886	19,691
		RR	ref	1.15	1.49	1.89	1.83	1.78
		95% CI		0.77–1.70	1.11–1.99	1.48–2.40	1.45–2.32	1.39–2.28