Characteristics and risk factor analyses of high-grade intraepithelial neoplasia in older patients with colorectal polyps

Table 1 Comparison of population characteristics between high-grade intraepithelial neoplasia group and low-grade intraepithelial neoplasia group, n (%)

Population characteristics	HGIN group (number of cases = 84)	LGIN group (number of cases = 112)	t/χ2	P value
Age (years old)	74.7 ± 6.8	71.4 ± 5.0	3.916	0.000
Sex			0.500	0.479
Male	50 (59.52)	61 (54.46)
Female	34 (40.48)	51 (45.54)
Smoking			1.088	0.297
Yes	32 (38.1)	51 (45.54)
No	52 (61.9)	61 (54.46)
Drinking			1.340	0.247
Yes	43 (51.19)	48 (42.86)
No	41 (48.81)	64 (57.14)
Family history of colorectal cancer			8.588	0.003
Yes	13 (15.48)	4 (3.57)
No	71 (84.52)	108 (96.43)
Diabetes			5.104	0.024
Yes	20 (23.81)	13 (11.61)
No	64 (76.19)	99 (88.39)
Hypertension			2.054	0.152
Yes	23 (27.38)	21 (18.75)
No	61 (72.62)	91 (81.25)
Number of polyps			2.458	0.117
Solitary	78 (92.86)	96 (85.71)
Multiple	6 (7.14)	16 (14.29)

LGIN: Low-grade intraepithelial neoplasia; HGIN: High-grade intraepithelial neoplasia.