Association between mucosal surface pattern under near focus technology and Helicobacter pylori infection

Table 2 Endoscopic findings with standard focus high definition white light and association with Helicobacter pylori infection

Location	Feature	Patients	Sensitivity % (95%CI)	Specificity % (95%CI)	PPV % (95%CI)	NPV % (95%CI)	AUC % (95%CI)	Accuracy % (95%CI)
Body	Erythema	75	80.9 (66.7-90.9)	73.6 (65.5-80.7)	50.7 (38.9-62.4)	92.0 (85.3-62.4)	0.77 (0.70-0.84)	75.4 (68.6-81.4)
	Erosion	16	10.6 (3.6-23.1)	92.1 (86.4-96.0)	31.3 (11.0-58.7)	75.4 (68.3-81.7)	0.51 (0.46-0.56)	71.7 (64.6-78.0)
	Exudate	4	6.4 (1.3-17.5)	99.3 (96.1-100)	75.0 (19.4-99.4)	76.0 (69.1-82.0)	0.53 (0.49-0.56)	75.9 (69.2-81.9)
	Atrophy	15	19.1 (9.1-33.3)	95.7 (90.9-98.4)	60.0 (71.0-83.9)	77.9 (71.0-83.9)	0.57 (0.52-0.63)	76.5 (69.7-82.3)
	Nodularity	7	6.4 (1.3-17.5)	97.1 (92.8-99.2)	42.9 (9.9-81.6)	75.6 (68.6-81.6)	0.52 (0.48-0.56)	74.3 (67.4-80.4)
Antrum	Erythema	87	72.3 (57.4-84.4)	62.1 (53.6-70.2)	39.1 (28.8-50.1)	87.0 (78.8-92.9)	0.67 (0.60-0.75)	64.7 (57.4-71.5)
	Erosion	38	21.3 (10.7-35.7)	80.0 (72.4-86.3)	26.3 (13.4-43.1)	75.2 (67.4-81.9)	0.51 (0.44-0.57)	65.2 (57.9-72.0)
	Exudate	1	2.1 (0.5-11.3)	100 (97.4-100)	100 (2.5-100)	75.3 (68.4-81.3)	0.51 (0.49-0.53)	75.4 (68.6-81.4)
	Atrophy	16	23.4 (12.3-38.0)	96.4 (91.9-98.8)	68.8 (41.3-89.0)	78.9 (72.1-84.8)	0.60 (0.54-0.66)	78.1 (71.4-83.8)
	Nodularity	7	10.6 (3.5-23.1)	98.6 (94.9-99.8)	71.4 (29.0-96.3)	76.7 (69.8-82.6)	0.55 (0.50-0.59)	76.5 (69.7-82.3)

CI: Confidence interval; PPV: Positive predictive value; NPV: Negative predictive value; AUC: Area under receiver operating characteristic curve.