Rigorous test-negative design study with large real-world population (73,160 cases) over 15 years demonstrating vaccine effectiveness against the target pathogen with precise confidence intervals; not practice-changing because vaccination policy was already implemented.
The Korean Journal of Helicobacter and Upper Gastrointestinal Research
A narrative review synthesizing evidence on gastric atrophy staging and risk stratification to inform clinical surveillance strategy and serological monitoring in individual patients.
This is a clinical trial registry record describing a planned Phase 2 study with no results reported; it documents study design and biomarker strategy but carries no efficacy or safety data.
This is a withdrawn Phase 3 trial registration with no results posted; the study was not completed and therefore provides no evidence of efficacy or safety.
Phase 3 RCT with completed recruitment (437 participants) addressing a significant clinical question, but this registry record reports no results; evidence strength cannot be assessed without outcome data.
This is a WHO policy synthesis and scientific evidence review consolidating diagnostic and biomarker advances from 2020–25, informing updated recommendations for TB detection and drug resistance across populations and specimen types.
A costing model informed by expert consensus and real-world data from two African laboratories, providing evidence-based cost estimates and procurement guidance for implementing clinical bacteriology in resource-limited settings, without comparative effectiveness or outcome data.