Gastroscopy Yield in the Young: Comprehensive Assessment of Endoscopic and Histologic Findings - A Comparative Study

Background. The escalating utilization of gastroscopy in young individuals necessitates an in-depth examination of its diagnostic yield and outcomes in this population. This study aims to investigate and compare various aspects of gastroscopy between young and older adults, shedding light on age-related differences in indications, endoscopic findings, histologic outcomes, and clinically significant findings (CSFs). Methods. A retrospective, large cohort study spanning five years, focused on consecutive patients undergoing gastroscopy. We analyzed age subgroups, specifically categorizing patients into those aged 30 and below, 30-39, 40-49, and a control group aged 50 and above. The investigation aimed to compare various aspects of gastroscopy outcomes among these distinct age categories. Indication-based analyses were conducted to assess the yield and outcomes in these subgroups, focusing on CSFs and the number needed to investigate (NNTI). Results. A total of 1313 young patients aged 16-49 and 3396 controls aged 50 and above were included. Among the young patients, unspecified epigastric pain and dyspepsia emerged as a prevalent indication, accounting for 41.5% of cases. Endoscopic findings revealed a significantly higher diagnosis rate of gastritis than controls (48.2% vs. 35.7%; p<0.001). Histologic analysis demonstrated a substantially elevated rate of H. pylori-associated gastritis in the young (41.1% vs. 29%; p<0.001). Notably, although significantly lower than older controls, precancerous lesions were detected in 7.5% of young patients. CSFs' diagnosis rate displayed a clear age-dependent increase. Particularly, gastroscopy for upper gastrointestinal bleeding and iron deficiency anemia were associated with higher CSF rates across all young-age subgroups. In multivariate analysis, age and indications of upper gastrointestinal bleeding and iron deficiency anemia were predictors of CSFs' detection in young patients. Conclusion. This study comprehensively delineates various facets of gastroscopy in the young population, elucidating age and indication-specific patterns in endoscopic and histologic findings, and clinically significant outcomes.