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

Table 6 Studies associating loss of regular arrangement of collecting venules with the presence of Helicobacter pylori

Ref.	Country	n	RAC +	Technology	Sensitivity	Specificity	PPV	NPV
Machado et al[16], 2008	Brazil	99	60	SD	96.9	88.1	-	-
Cho et al[15], 2013	Korea	617	254	S-HD	93.3	89.1	92.	90.6
Yagi et al[17], 2014	Japan	38	26	S-HD	79	52	70	63
Garcés-Durán et al[14], 2019	Spain	140	47	S-HD	100	48.9	47.3	100
Ebigbo et al[22], 2021	German	200	-	S-HD	80.7	57.4	40.0	89.4
Glover et al[21], 2021	United Kingdom	153	108	S-HD	78.4	64.3	40.0	90.7
Jang et al[18], 2020	Korea	115	-	NF + NBI	86.5	84.1	84.1	88.3
Yagi et al[11], 2002	Japan	557	161	ME	93.8	96.2	-	-
Nakagawa et al[12], 2003	Japan	92	23	ME	66.7	100	100	82.4
Anagnostopoulos et al[10], 2007	United Kingdom	95	64	ME	100	92.7	83.8	100
Yagi et al[17], 2014	Japan	49	30	ME + NBI	91	83	88	86
This study	Brazil	187	105	NF	87.2	70.7	50.0	94.3

RAC: Regular arrangement of collecting venules; S-HD: Standard high definition; ME: Magnification endoscopy; SD: Standard definition; NF: Near focus; PPV: Positive predictive value; NPV: Negative predictive value.