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 registered but not-yet-recruiting prospective single-arm implementation study with no reported results; it describes a planned evaluation of an AI screening device without efficacy or safety data.
This is an active registry record for an ongoing interventional study with no results posted; it describes a planned screening intervention in breast cancer patients with primary outcomes focused on quality of life and incidence detection.
This is a registry record describing an active observational study with no reported results; it documents planned enrollment and outcome measures only, insufficient for evidence grading.