From: The diagnostic value of pepsin detection in saliva for gastro-esophageal reflux disease: a preliminary study from China
Concentrations (ng/mL)
Sen (%)
Spe (%)
Youden index (%)
PPV (%)
NPV (%)
PLR
NLR
≥16
85.1
47.1
32.2
60.5
76.8
1.61
0.32
≥76
73.0
88.3
61.3
85.6
77.4
6.24
0.30
≥125
54.8
90.0
44.8
83.9
67.6
5.48
0.50
≥200
44.3
97.2
41.5
93.8
64.7
15.82
0.57