Colon mucosal neoplasia referred for endoscopic mucosal resection: Recurrence of adenomas and prediction of submucosal invasion

Table 1 Baseline characteristics (n = 500)

Variable	Median	IQR	Frequency	Percent, %
Number of > 20 mm adenomas	1	0
Polyp number	1	0
Size (mm)	30	15
Age (yr)	68	14
Height (cm)	170	15
Weight (kg)	80	25
BMI	28	7.35
Colonoscopy duration (min)	44	30
If blood transfusion, number of units	0	0
Sex
Male			260	52
Female			240	48
ASA
Class 1			14	3
Class 2			350	70
Class 3			136	27
Paris classification
Ip (pedunculated)			34	6.8
0-IIa (flat elevation of mucosa)			316	63.2
0-IIb (flat mucosal change)			68	13.6
0-IIc (flat mucosal depression)			3	0.6
0-IIa + c (flat elevation with central depression)			26	5.2
0-IIa + Is (flat elevation with raised broad based nodule)			53	10.6
Morphology
Granular			260	52
Non-granular			206	41
Mixed			34	7
Kudo Pit Pattern
I			3	1
II			10	2
IIIs			192	38
IIIL			172	34
IV			62	12
V			19	4
IIIs + IIIL			20	4
IIIs + IV			4	1
IIIL + IV			18	4
Location
Rectum (< 5 cm from anus)			4	1
Rectum (> 5 cm from anus)			31	6
Sigmoid			45	9
Descending colon			25	5
Splenic flexure			6	1
Transverse			65	13
Hepatic flexure			39	8
Ascending colon			161	32
Cecum			102	20
Ileocecal valve involved			18	4
Appendiceal orifice involved			4	1
Lesion size
20 mm			89	18
21-30 mm			198	40
31-40 mm			107	21
> 40 mm			106	21

IQR: Inter quartile range; ASA: American Society of Anesthesiology; BMI: Body mass index; ICV: Ileocecal valve.