Table 2.

Distribution of person-years at risk (%) by time-varying worker characteristics and cumulative respirable crystalline silica exposure level among 1 541 505 men and 1 470 769 women, Denmark, 1979–2015

	Men				Women
	Cumulative respirable crystalline silica (µg/m3-years)				Cumulative respirable crystalline silica (µg/m3-years)
	0	2.0–29.2	29.3–93.9	94.0–1622	0	2.0–29.2	29.3–93.9	94.0–1622
	28 596 448	1 581 413	1 644 508	1 790 255	30 957 666	342 405	280 298	134 819
Worker characteristics	Person-years	Person-years	Person-years	Person-years	Person-years	Person-years	Person-years	Person-years
Occupationa
Armed forces	3	1	1	0	0	0	0	0
White-collar workers	40	17	13	12	63	36	32	29
Skilled blue-collar workers	17	26	28	41	1	12	14	21
Unskilled blue-collar workers	16	42	45	36	12	32	35	34
Others	12	13	10	7	14	18	16	12
Missing	12	1	3	4	10	2	3	4
Age
<25	38	26	21	8	35	20	13	5
26–35	32	36	35	31	33	34	35	29
>36	29	38	44	61	32	46	52	66
Calendar year
1979–84	7	2	6	2	6	2	3	1
1985–94	22	12	19	21	21	12	16	18
1995–2004	30	29	30	32	30	28	33	33
2005–15	41	57	45	45	43	58	48	48
Probability of smoking
5–25%	24	23	18	21	35	37	29	28
26–35%	28	39	34	34	29	38	40	40
36–74%	32	38	48	45	24	25	31	32
Missing	16	–	–	–	12	–	–	–
Educationb
Lower secondary	27	43	44	30	26	38	40	41
Vocational or high secondary	46	44	45	61	44	43	45	46
Short cycle higher	5	3	3	3	3	4	4	4
Medium cycle higher	9	5	4	4	17	10	7	6
Long cycle higher	7	2	1	0	6	3	2	1
Unknown	6	3	3	2	4	2	2	2
Duration (year)
0	100	0	0	0	100	0	0	0
1	0	58	4	0	0	60	3	0
2–5	0	41	68	13	0	40	72	20
6–39	0	1	28	87	0	0	25	80

^aGrouped according to ISCO 88 = International Standard Classification of Occupations, 1988 revision: Armed forces (ISCO 88 codes 0110), White-collar workers (ISCO 88 codes 1000–5999), Skilled blue-collar workers (ISCO 88 codes 6000–7999), Unskilled blue-collar workers (ISCO 88 codes 8000–9999), Others (unemployed or retired).

^bHighest attained educational level.