Table 2 Hazard ratio estimates of pancreatic cancer in relation to duration of work in job categories grouped by process.

Duration of working in each process	Cases (n = 180)	Non‐cases (n = 3183)	HR*	95% CI	p for trend
Warehouse, packing, quality control
Never	150	2663	1.0	Ref
<10 years	6	183	0.7	(0.3 to 1.5)
10–20 years	9	147	1.2	(0.6 to 2.5)
>20 years	15	190	1.4	(0.8 to 2.4)	0.28
Cotton handing, processing, spinning
Never	143	2587	1.0	Ref
<10 years	13	123	1.5	(0.8 to 2.8)
10–20 years	4	154	0.5	(0.2 to 1.3)
>20 years	20	319	0.9	(0.5 to 1.5)	0.43
Mixed fibre handling, processing, spinning
Never	152	2741	1.0	Ref
<10 years	9	126	1.1	(0.5 to 2.2)
10–20 years	8	115	1.4	(0.7 to 2.9)
>20 years	11	201	0.8	(0.5 to 1.6)	0.92
Weaving
Never	118	2063	1.0	Ref
<10 years	9	230	0.7	(0.3 to 1.4)
10–20 years	17	296	1.0	(0.6 to 1.8)
>20 years	36	594	0.9	(0.6 to 1.4)	0.70
Cutting/sewing
Never	164	2889	1.0	Ref
<10 years	9	85	2.3	(1.1 to 4.6)
10–20 years	3	96	0.6	(0.2 to 2.0)
>20 years	4	113	0.7	(0.3 to 2.1)	0.71
Maintenance
Never	174	3077	1.0	Ref
<10 years	2	48	1.0	(0.2 to 4.1)
10–20 years	2	27	1.5	(0.3 to 6.4)
>20 years	2	31	1.4	(0.3 to 6.1)	0.54
Administration (non‐production)
Never	130	2274	1.0	Ref
<10 years	21	339	1.4	(0.9 to 2.3)
10–20 years	17	268	1.5	(0.9 to 2.5)
>20 years	12	302	0.8	(0.4 to 1.5)	0.78

*Age (continuous) and smoking status (categories) adjusted hazard ratio.