Diagnostic performance of narrow-band imaging international colorectal endoscopic and Japanese narrow-band imaging expert team classification systems for colorectal cancer and precancerous lesions

Table 1 Demographic characteristics of 87 patients with 125 colorectal lesions

Variables	Number
Patients	87
Lesions	125
Sex, male/female	61; 26
Age in yr, mean ± SD; range	59.9 ± 10.6; 34-89
Location
Proximal colon	42
Distal colon	61
Rectum	22
Size in mm, mean ± SD; range	14.3 ± 0.7; 4-45
5	9
6-10	44
11-20	58
≥ 20	14
Morphology
Ip	22
Isp	39
Is	30
IIa	31
IIb	3
Pathology
Hyperplastic or sessile serrated lesion	13
Tubular adenoma	67
Tubulovillous adenoma	27
Low-grade intramucosal neoplasia	1
High-grade intramucosal neoplasia	3
Superficial submucosal invasive cancer	10
Deep submucosal invasive cancer	4