Prospective real-time evaluation of diagnostic performance using endocytoscopy in differentiating neoplasia from non-neoplasia for colorectal diminutive polyps (≤ 5 mm)

Table 1 Characteristics of the studied patients and resected polyps

Total patients, n	39
Male/female	23/16
Age (mean ± SD, yr)	65.8 ± 13.1
Polyps, n	63
Size (mean ± SD, mm)	3.3 ± 0.9
Location, right/left	33/30
Shape, protruding/flat/depressed	3/60/0
Histopathology
Hyperplastic polyp	13
Adenoma	50

Table 2 Diagnostic performance of endocytoscopy for differentiating adenoma from hyperplastic polyp among diminutive colorectal polyps

EC classification	Hyperplastic polyp	Adenoma
	n	n
EC 1b	12	1
EC 2	1	49

Sensitivity 98.0% (95%CI: 89.3%-99.9%); Specificity 92.3% (95%CI: 64.0%-99.8%); Accuracy 96.8% (95%CI: 89.0%-99.6%); Positive predictive value 98.0% (95%CI: 89.3%-99.9%); Negative predictive value 92.3% (95%CI: 64.0%-99.8%). EC: Endocytoscopic.