Table 1.

Baseline Characteristics of Patients and Tumors

Characteristic	Value (n=43)
Patient demographics
Age, yr	64.0±10.8
Sex, male:female	27:16
Tumor characteristics
Macroscopic appearance
Polypoid	9
Nonpolypoid	4
Laterally spreading tumor	30
Tumor location
Right colon*	20
Left colon†	9
Upper rectum‡	3
Middle to lower rectum§	11
Tumor size, mm	33.5±19.4
Pathology
Low-grade dysplasia	12
High-grade dysplasia	17
Carcinoma	12
Carcinoid	2

Data are presented as mean±SD or number.

^*Right colon is composed of the cecum, ascending, and transverse colon;

^†Left colon is composed of the descending and sigmoid colon;

^‡Upper rectum was defined between 12 cm and 16 cm from the anal verge;

^§Middle to lower rectum was defined distal to 12 cm from the anal verge.