Table 2

Standardised incidence ratios (SIR) and 95% confidence intervals (CI) for pancreatic cancer among patients who were hospitalised for alcoholism, alcoholic chronic pancreatitis, non-alcoholic chronic pancreatitis, alcoholic liver cirrhosis, and non-alcoholic liver cirrhosis during 1965–1994, Sweden*

Determinant	Alcoholism			Alcoholic chronic pancreatitis			Non-alcoholic chronic pancreatitis			Alcoholic liver cirrhosis			Non-alcoholic liver cirrhosis
	Obs†	SIR	95%CI	Obs†	SIR	95%CI	Obs†	SIR	95%CI	Obs†	SIR	95%CI	Obs†	SIR	95%CI
*Excluding the first year of follow up.
†Observed number of cancer cases.
‡Person time before the onset of diabetes mellitus was allocated to non-diabetes mellitus stratum.
Total	305	1.4	1.2 –1.5	7	2.2	0.9– 4.5	74	8.7	6.8–1 0.9	27	1.9	1.3– 2.8	11	1 .2	0.6– 2.2
Sex
Male	254	1.3	1.2–1.5	4	1.4	0.4–3.7	51	9.9	7.4–13.1	22	2.0	1.3–3.1	5	1.2	0.4–2.8
Female	51	1.6	1.2–2.1	3	7.3	1.5–21.4	23	6.7	4.3–10.1	5	1.6	0.5–3.7	6	1.3	0.5–2.8
p value		0.25			0.02			0.11			0.62			0.90
Follow up duration (y)
1–4	82	1.3	1.0–1.6	4	3.8	1.0–9.6	56	18.0	13.6–23.4	9	1.5	0.7–2.9	3	0.8	0.2–2.3
5–9	91	1.4	1.1–1.7	2	2.0	0.2–7.2	12	4.5	2.3–7.9	13	3.1	1.7–5.3	1	0.4	0.01–2.2
10+	132	1.5	1.2–1.8	1	0.9	0.02–5.0	6	2.1	0.8–4.7	5	1.3	0.4–3.0	7	2.8	1.1–5.7
10–14	78	1.5	1.2–1.9
15–30	54	1.4	1.1–1.8
p value for trend		0.35			0.16			<0.01			0.99			0.04
Age at index discharge (y)
<50	107	1.7	1.4–2.1	2	1.7	0.2–6.2	9	8.1	3.7–15.4	3	1.7	0.3–4.8	1	0.9	0.02–4.8
50–59	91	1.2	1.0–1.5	4	3.5	0.9–8.9	24	10.0	6.4–14.9	13	2.9	1.5–4.9	4	1.8	0.5–4.6
60–69	81	1.3	1.1–1.6	1	1.5	0.04–8.2	32	11.9	8.1–16.7	8	1.5	0.6–2.9	5	1.6	0.5–3.7
≥70	26	1.1	0.7–1.6	0	—	—	9	3.8	1.8–7.3	3	1.4	0.3–4.1	1	0.4	0.01–2.4
p value for trend		0.02			0.77			0.12			0.35			0.50
Diabetes mellitus‡
No	282	1.4	1.2–1.5	7	3.2	1.3–6.6	63	8.8	6.8–11.3	21	1.8	1.1–2.8	8	1.1	0.5–2.1
Yes	23	1.7	1.1–2.6	0	—	—	11	7.7	3.9–13.8	6	2.4	0.9–5.2	3	2.1	0.4–6.1
p value		0.29			0.07			0.68			0.56			0.32