Table 3. Characteristics of advanced and non-advanced adenoma.

Variables	Advanced group	Non-advanced group	P value
Age	65.4 ± 9.6	61.2 ± 11.1	0.030
Gender
M:F ratio	1:0.87	1:0.40	0.038
Size
Diminutive	6 (21.4%)	1,852 (67.8%)	< 0.001
Small	22 (78.6%)	881 (32.2%)
Mean size, cm	0.6 ± 0.2	0.4 ± 0.2	0.005
Shape
Is	12 (42.9%)	1,530 (56.0)	0.142
IIa	8 (28.6%)	780 (28.5)
Isp	6 (21.4%)	390 (14.3)
Ip	2 (7.1%)	33 (1.2)
Distribution
Right	14 (50%)	1,522 (55.7%)	0.547
Left	14 (50%)	1,211 (44.3%)

M, male; F, female; Ip, pedunculated polyp; Isp, subpedunculated polyp; Is, sessile polyp; IIa, flat polyp.