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Copyright ©The Author(s) 2021.
World J Gastroenterol. Nov 7, 2021; 27(41): 7100-7112
Published online Nov 7, 2021. doi: 10.3748/wjg.v27.i41.7100
Table 1 Helicobacter pylori positivity by different diagnostic tests
Patients
13C-UBT
Histology (biopsy)
RUT (biopsy)
SAT (stool)
PCR1 (biopsy)
NPCR (biopsy)
NPCR (stool)
NPCR (saliva)
5++++++++
3+++++++-
7++++++--
2+--++++-
5+--+++--
2++--++--
6+----+--
2+-------
2-----+--
3-------+
44--------
Total 81321715222432108
Table 2 Sensitivity and specificity of diagnostic tests

Histology (biopsy)
RUT (biopsy)
SAT (stool)
PCR (biopsy)
NPCR (biopsy)
Sensitivity (%)53.146.968.875100
Specificity (%)10010010010095.6
Positive predictive values (%)10010010010093.8
Negative predictive values (%)74.672.181.584.691.3