Table 2.
Results of the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of each test; for the total study group and differentiated for preceding H. pylori eradication therapy or placebo
| Test | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|
| Culture | ||||
| Total |
82 |
100 |
100 |
87 |
| Eradication |
73 |
100 |
100 |
97 |
| Placebo |
83 |
100 |
100 |
62 |
| H&E stains | ||||
| Total |
93 |
99 |
99 |
94 |
| Eradication |
93 |
99 |
93 |
99 |
| Placebo |
92 |
100 |
100 |
78 |
|
Subgroup of 68 patients | ||||
| IHC stains | ||||
| Total |
100 |
95 |
94 |
100 |
| Eradication |
100 |
94 |
60 |
100 |
| Placebo |
100 |
100 |
100 |
100 |
| H&E+IHC | ||||
| Total |
100 |
92 |
91 |
100 |
| Eradication |
100 |
90 |
50 |
100 |
| Placebo | 100 | 100 | 100 | 100 |
H&E: hematoxylin and eosin, IHC: immunohistochemistry.