Table 1. General demographic information on the cohort used in this study.

		Number of subjects		Percent*
Start of work (year)
1910–1929		2		0,1
1930–1949		167		6,5
1950–1969		586		23,0
1970–1989		1139		44,6
1990-		657		25,8
Years of employment
1–4		858		33,6
5–9		541		21,2
10–14		333		13,1
15–19		236		9,3
>20		583		22,9
Job categories
Many jobs		325		12,7
Caster		78		3,1
Moulder		236		9,3
Core maker		268		10,5
Sand mixer		7		,3
Melter		150		5,9
Furnace and ladle repair		7		,3
Shake out		22		,9
Fettler		486		19,1
Maintenance		187		7,3
Transportation		32		1,3
Other specified		104		4,1
Foundry workers		263		10,3
Other unspecified		386		15,1
Total		2551		100,0
	Mean	Median	Standard Deviation	Minimum	Maximum
Birth year	1948	1950	18,8	1897	1985
Age at start of employment	28	25	10,3	12	74
Years of employment	11,7	7,3	11,0	1,0	54,6
Exposure for silica mg/m3**	0,48	0,26	0,58	0,015	10,3

*percent of total cohort (n = 2551).

** Cumulative respirable silica-exposure