Table 1

Characteristics of 2716 631 person-years (%) during follow-up (1997-2013) of 175 409 Danish farming workers and wood workers

	Person-years (%)
	Overall					Men					Women
	Organic dust exposure					Organic dust exposure					Organic dust exposure
	Low	Intermediate-low	Intermediate-high	High	Total	Low	Intermediate-low	Intermediate-high	High	Total	Low	Intermediate-low	Intermediate-high	High	Total
	0.02–1.32 mg/m³-year	>1.32–3.82 mg/m³-year	>3.82–10.45 mg/m³-year	>10.45–193.8 mg/m³-year		0.02–1.32 mg/m³-year	>1.32–3.82 mg/m³-year	>3.82–10.45 mg/m³-year	>10.45–193.8 mg/m³-year		0.02–1.32 mg/m³-year	>1.32–3.82 mg/m³-year	>3.82–10.45 mg/m³-year	>10.45–193.8 mg/m³-year
Characteristics
	679 130 py (25% of total)	679 168 py (25% of total)	679 161 py (25% of total)	679 172 py (25% of total)	2716 631 py	489 754 py (23% of total)	512 789 py (24% of total)	537 109 py (25% of total)	614 693 py (29% of total)	2 154 345 py	189 376 py (34% of total)	166 379 py (30% of total)	142 052 py (25% of total)	64 479 py (12% of total)	562 286 py
Age, years
19–29	12	11	11	7	10	12	12	11	7	10	9	10	8	6	9
30–49	71	72	72	71	71	71	72	72	71	72	72	72	72	67	71
50–63	17	17	17	22	19	17	16	17	22	18	19	18	20	27	20
Exposure source by industry*
Farming	33	33	36	25	32	29	28	32	23	28	42	47	49	46	46
Wood	61	53	45	56	53	64	56	46	57	56	54	45	39	42	46
Farming and wood	6	14	19	19	15	7	16	22	20	16	4	8	12	12	8

*Exposure source reflects the percentage of person-years which originate from individuals who are solely exposed to farm work, and solely exposed to woodwork, respectively.
py, person-years.