Table 3

Hazard ratio estimates of pancreatic cancer in relation to duration of occupational exposures

Exposure	Cases (n = 180)	Non-cases (n = 3183)	HR*	95% CI	p for trend
*Age (continuous) and smoking status (categories) adjusted hazard ratio.
Wool
Never	151	2733	1.0	Ref
<10 years	2	94	0.3	(0.1 to 1.4)
10–20 years	6	111	0.9	(0.4 to 2.2)
>20 years	21	245	1.4	(0.9 to 2.3)	0.31
Silk
Never	172	3019	1.0	Ref
<10 years	2	37	1.0	(0.2 to 4.3)
10–20 years	1	49	0.4	(0.1 to 3.1)
>20 years	5	78	1.1	(0.4 to 2.8)	0.99
Synthetic fibre dust
Never	100	1920	1.0	Ref
<10 years	15	237	1.3	(0.7 to 2.3)
10–20 years	19	362	1.1	(0.7 to 1.8)
>20 years	46	664	1.3	(0.9 to 1.8)	0.21
Non-textile dust
Never	147	2658	1.0	Ref
<10 years	7	201	0.6	(0.3 to 1.4)
10–20 years	15	163	1.5	(0.9 to 2.6)
>20 years	11	161	1.2	(0.6 to 2.3)	0.33
Solvents
Never	165	2724	1.0	Ref
<10 years	4	170	0.5	(0.2 to 1.4)
10–20 years	8	139	1.1	(0.5 to 2.2)
>20 years	3	150	0.4	(0.1 to 1.3)	0.12
Lubricants
Never	62	1210	1.0	Ref
<10 years	20	330	1.2	(0.7 to 2.0)
10–20 years	27	496	1.0	(0.7 to 1.7)
>20 years	71	1147	1.0	(0.7 to 1.4)	0.72
Metals
Never	171	2956	1.0	Ref
<10 years	2	87	0.5	(0.1 to 2.1)
10–20 years	5	58	1.5	(0.6 to 3.9)
>20 years	2	82	0.6	(0.1 to 2.4)	0.73
EMF or non-ionising radiation
Never	52	1016	1.0	Ref
<10 years	24	343	1.4	(0.8 to 2.3)
10–20 years	29	576	1.0	(0.6 to 1.6)
>20 years	75	1248	1.0	(0.7 to 1.4)	0.63