Risk for colorectal cancer in ulcerative colitis: Changes, causes and management strategies

Table 1 Risk of colorectal cancer in recent population-based studies

Study	Location	Observed period	UC cohort size	Follow-up (person- years)	CRC	Annual crude incidence (%)	Cumulative incidence at 30 years (%)
North America
Bernstein et al[7]	Manitoba, Canada	1984-1997	2672	19655	36 CRC	0.16	NR
Bernstein et al[7]	Manitoba, Canada	1984-1997	2672	19655	13 rectum	0.06	NR
Jess et al[8]	Olmsted County, USA	1940-2004	378	5567	6	0.10	2
Europe
Winther et al[16]	Copenhagen County, Denmark	1962-1987	1160	22290	13	0.06	2.1
Palli et al[15]	Florence, Italy	1978-1992	689	7877	10	0.12	NR
Lakatos et al[4]	Veszprem, Hungary	1974-2004	723	8564	13	0.15	7.5

NR: Not reported.