2.2 | Study selection criteria
The inclusion criteria for studies were as follows: (1) Assessed the
accuracy of RAC for determining the status of H. pylori infection; (2)
Used a rapid urease test, serum H. pylori antibody, and histological
examination to define the reference standard for H. pylori infection;
and (3) provided sufficient information (true and false positives and
negatives) to construct the 2×2 contingency table.
The exclusion criteria were as follows: 1) reviews, letters, and case
reports; 2) studies with insufficient data to construct the 2×2 table;
and (3) studies not written in English.