Diagnostic performance of endoscopic classifications for neoplastic lesions in patients with ulcerative colitis: A retrospective case-control study

Table 1 Clinical characteristics of ulcerative colitis patients with neoplastic lesions (mean ± SD)

	UCAN group (n = 19)	SN group (n = 22)	P value
Age at UC onset (yr)	35.7 ± 10.9	48.8 ± 14.6	0.003a
Disease duration (yr)	17.8 ± 9.4	12.9 ± 10.7	0.120a
Sex			0.829b
Male	11	12
Female	8	10
Extent of disease			0.231b
Total colitis	16	14
Left-sided colitis	3	6
Proctitis	0	2
Clinical type			0. 139b
Relapse and remission	10	15
Chronic persistent	9	5
First attack	0	2
Pathological type			< 0.001b
LGD	2	16
HGD	11	5
Shallow submucosal invasive carcinoma	3	0
Deep submucosal invasive carcinoma	5	2
Primary sclerosing cholangitis	1	0	0.463c
Family history of colorectal cancer	1	2	0.639c

^aStudent t-test.

^bChi-square test.

^cFisher’s exact test.

P < 0.05 was considered statistically significant. SD: Standard deviation; HGD: High-grade dysplasia; LGD: Low-grade dysplasia; SN: Sporadic neoplasms; UC: Ulcerative colitis; UCAN: Ulcerative colitis-associated neoplasms.