Risk of cancer, with special reference to extra-intestinal malignancies, in patients with inflammatory bowel disease

Table 4 Cumulative incidences in both the inflammatory bowel disease cohort and the non-inflammatory bowel disease cohort and relative risk for different types of cancer

Cancer site	Cumulativeincidencein IBDcohort	Cumulative incidence inlocal population	RR	95%CI
Urinary bladder	0.68	0.13	5.23	1.95-13.87a
Breast	0.51	0.26	1.95	0.63-5.87
Melanoma	0.17	0.06	2.56	0.34-17.63
Basal cell carcinoma	0.33	1.26	0.26	0.06-1.00
Appendix	0.33	0.009	36.6	7.92-138.4a
Stomach	0.17	0.06	2.83	0.41-20.9
Pancreas	0.17	0.028	6.07	0.84-40.4
Lung	0.17	0.067	2.54	0.34-17.6
Liver	0.17	0.037	4.59	0.64-32.5
Small intestine	0.17	0.013	13.1	1.82-29.7a
Rectum	0.17	0.019	8.94	1.18-59.7a

^aP < 0.05. IBD: Inflammatory bowel disease.