Table 4.

Details of false negative images by DCNN model and endoscopists.

	Internal test set		External test set
Cause	DCNN, n (%)	Endoscopists, total n (%)	DCNN, n (%)	Endoscopists, totaln (%)
Total number	72	562	19	190
Small (< 10mm)	28 (38.88)	112 (19.93)	4 (21.05)	16 (8.42)
visual angle	18 (25)	50 (8.90)	1 (5.3)	2 (1.05)
Distant	12 (16.67)	90 (16.01)	3 (15.79)	12 (6.32)
Tangential Line	5 (6.94)	12 (2.14)	2 (10.53)	4 (2.1)
Ulcer	4 (5.56)	91 (16.19)	3 (15.79)	28 (14.74)
Adenoma-like	2 (2.78)	16 (2.85)	1 (5.3)	4 (2.1)
Inflammation-like	2 (2.78)	184 (32.74)	2 (10.53)	108 (56.84)
Blood	1 (1.39)	2 (0.36)	1 (5.3)	6 (3.16)
Scar-like	0 (0)	5 (0.89)	0 (0)	5 (2.63)
Others	0 (0)	0 (0)	2 (10.53)	5 (2.63)