Colorectal cancers in ulcerative colitis from a low-prevalence area for colon cancer

Table 1 Comparison of ulcerative colitis patients with and without colorectal cancer

	No malignancy	CRC	P value
Number of patients (males)	418 (242)	12 (5)	0.3751
Age (mean ± SD, yr)	44.5 ± 14.6	49.6 ± 10.1	0.232
Median duration of disease (interquartile range)	6 (7)	18 (8)	0.000013
History of smoking	31	0	1.0
Family history of IBD	24	2	0.15
Pancolitis	159	9	0.01
Left-sided colitis	129	2	1.0
No. of patients on azathioprine	108	2	0.7381
Poor compliance with therapy	144	6	0.23
Poor disease control	50	5	0.0071

¹Fisher’s exact test;

²Unpaired t test;

³Mann Whitney test. CRC: Colorectal cancer; IBD: Inflammatory bowel disease.