Establishment and validation of a computer-assisted colonic polyp localization system based on deep learning

Table 1 Performance of lesion detection and localization

	Lesions	Sensitivity, %	Specificity, %	PPV, %	NPV, %
Overall	1412	95.0 (93.7-96.0)	99.1 (98.9-99.3)	93.7 (92.3-94.9)	99.3 (99.1-99.4)
Pathology
Non-adenomatous polyps	487	93.4 (90.8-95.4)	99.1 (98.9-99.3)	83.5 (80.0-86.5)	99.7 (99.5-99.8)
Adenomatous polyps	640	95.2 (93.1-96.6)	99.1 (98.9-99.3)	87.1 (84.4-89.5)	99.7 (99.5-99.8)
Adenocarcinomas	285	97.2 (94.3-98.7)	99.1 (98.9-99.3)	75.5 (70.7-79.7)	99.9 (99.8-100.0)
Size
≤ 5 mm	713	94.1 (92.1-95.7)	99.1 (98.9-99.3)	88.2 (85.6-95.3)	99.6 (99.4-99.7)
6-9 mm	396	95.2 (92.5-97.0)	99.1 (98.9-99.3)	80.7 (76.8-84.1)	99.8 (99.7-99.9)
≥ 10 mm	303	96.7 (93.8-98.3)	99.1 (98.9-99.3)	76.5 (71.9-80.6)	99.9 (99.8-99.9)
Paris classification
Ip	180	96.0 (91.8-98.3)	99.1 (98.9-99.3)	65.8 (59.7-71.4)	99.9 (99.8-1.00)
Is	581	96.1 (94.0-97.4)	99.1 (98.9-99.3)	86.1 (83.2-88.6)	99.8 (99.6-99.8)
IIa	525	92.6 (89.9-94.6)	99.1 (98.9-99.3)	84.4 (81.1-87.2)	99.6 (99.5-99.7)
IIb	30	100.0 (85.9-100.0)	99.1 (98.9-99.3)	25.0 (17.7-33.9)	100.0 (99.9-100.0)
IIc	2	100.0 (19.8-100.0)	99.1 (98.9-99.3)	2.2 (0.4-8.4)	100.0 (99.9-100.0)
III	32	96.9 (82.0-99.8)	99.1 (98.9-99.3)	25.6 (18.3-34.5)	100.0 (99.9-100.0)
Unclassified	62	96.8 (87.8-99.4)	99.1 (98.9-99.3)	40.0 (32.2-48.3)	100.0 (99.9-100.0)

PPV: Positive predictive value; NPV: Negative predictive value.