Table 1. Characteristics of Painesville, Ohio chromate production workers (n=714) and subset dead from lung cancer (n=77).

Characteristic	Study cohort		Workers dead from lung cancer
	n	%	n	%
Year of birth
1877–1899	37	5.2	1	1.3
1900–1909	86	12.0	10	13.0
1910–1919	223	31.2	27	35.1
1920–1929	250	35.0	26	33.8
1930–1939	87	12.2	11	14.3
1940–1959	31	4.3	2	1.8
Year first exposed
1940–1944	122	17.1	21	27.3
1945–1949	186	26.1	19	24.7
1950–1954	124	17.4	16	20.8
1955–1959	91	12.8	9	11.7
1960–1964	88	12.3	6	7.8
1965–1972	103	14.4	6	7.8
Length of employment (years)
<1	198	27.7	14	18.2
1–4	245	34.3	17	22.1
5–9	113	15.8	11	14.3
10–19	76	10.6	10	13.0
20–32	82	11.5	25	32.5
	Mean (SD)	Range	Mean (SD)	Range
Cumulative exposure (mg/m3-years)	1.1 (2.1)	0.0002–22.1	2.5 (3.9)	0.004–22.1
Highest monthly exposure (mg/m3)	0.3 (0.4)	0.003–4.1	0.5 (0.7)	0.01–4.1
Age at hire (year)	33.6 (11.0)	12.9–69.4	30.6 (9.2)	18.0–60.1
Length of follow-up (years)	34.4 (16.1)	0.1–69.9	35.2 (13.6)	4.3–62.7