Insights into the Epidemiology and Determinants of Helicobacter Pylori Negative Gastritis: A Retrospective Study

Introduction: The prevalence of Helicobacter pylori (HP)-negative gastritis is rising in the United States, yet its origins and risk factors remain largely unexplored. This study aims to assess the prevalence of HP-negative gastritis and explore the demographic, clinical, and risk factor profiles that differentiate HP-negative from HP-positive subjects with histological evidence of gastritis. Methods: We conducted a retrospective analysis of 241 patients who underwent Esophagogastroduodenoscopy (EGD) for upper gastrointestinal symptoms at a tertiary care center between July 2020 and July 2021. Symptoms prompting referral included dysphagia, abdominal pain, nausea, and others. Gastric biopsies were collected from the antrum and body, and clinical, demographic, and laboratory data were analyzed to compare HP-negative and HP-positive gastritis cases. Results: Of the patients biopsied, 38.2% (n=92) showed histological evidence of gastritis, with 78% of these being HP-negative and 22% HP-positive. HP-negative cases were predominantly chronic chemical gastritis (61.5%), while all HP-positive cases were active chronic gastritis. Significant ethnic disparities were noted; 61.5% of HP-negative patients were Caucasian, and 72.7% of HP-positive patients were African American. Medical comorbidities, particularly gastroesophageal reflux disease (GERD), were more associated with HP-negative gastritis. The antrum was more frequently affected in HP-negative cases compared to HP-positive cases. Conclusion: HP-negative gastritis is significantly linked with Caucasian ethnicity and existing medical comorbidities but shows no strong associations with the analyzed lifestyle or medication factors. These findings highlight the need for further large-scale prospective studies to better understand the etiology, risk factors, and clinical implications of HP-negative gastritis.