Table 3. Cancer incidence risks by age at onset of diabetes: selected sites.

		Age at onset of diabetes (years)
		<30		30–49
ICD9 code	Cancer site	No.	SIR (95% CI)	No.	SIR (95% CI)
150	Oesophagus	4	1.06 (0.29–2.73)	15	1.49 (0.83–2.46)
151	Stomach	7	1.20 (0.48–2.47)	12	0.77 (0.40–1.35)
153–154	Colon and rectum	14	0.71 (0.39–1.19)	52	1.11 (0.83–1.46)
155	Liver	1	0.70 (0.02–3.92)	7	2.46 (0.99–5.07)
156	Gall bladder	0	—	1	0.57 (0.01–3.19)
157	Pancreas	5	1.36 (0.44–3.18)	12	1.30 (0.67–2.27)
162	Lung	27	1.14 (0.75–1.65)	56	0.81 (0.61–1.05)
172	Melanoma	20	1.21 (0.74–1.86)	9	1.20 (0.55–2.29)
174, 175	Breast	34	0.87 (0.60–1.21)	41	0.87 (0.62–1.17)
179, 182	Corpus uteri	4	1.20 (0.33–3.08)	12	1.84 (0.95–3.22)
180	Cervix	10	0.72 (0.34–1.32)	7	1.48 (0.60–3.06)
183	Ovary	16	2.14 (1.22–3.48)**	6	0.72 (0.26–1.57)
185	Prostate	6	0.84 (0.31–1.82)	15	0.57 (0.32–0.94)*
186	Testis	13	0.93 (0.49–1.59)	1	0.77 (0.02–4.27)
188	Bladder	7	0.91 (0.37–1.88)	20	1.00 (0.61–1.55)
189	Kidney	2	0.43 (0.05–1.54)	10	1.13 (0.54–2.08)
191, 192	Nervous system	14	1.02 (0.56–1.72)	2	0.26 (0.03–0.94)*
196–9	Primary unknown	5	0.65 (0.21–1.51)	15	0.81(0.45–1.34)
200, 202	Non-Hodgkin's lymphoma	14	1.13 (0.62–1.89)	12	1.00 (0.52–1.74)
204–208	Leukaemia	10	0.90 (0.43–1.65)	5	0.69 (0.22–1.61)
140–172, 174–208	All malignancies except nonmelanoma skin cancer	241	0.95 (0.84–1.08)	341	0.95 (0.85–1.05)

ICD=International Classification of Diseases; SIR=standardised incidence ratio; CI=confidence interval.

^*P<0.05.

^**P<0.01.