The analysis of the correlation between the severity of gastric mucosal damage in chronic atrophic gastritis, determined endoscopically, and the stage of gastric mucosal atrophy and intestinal metaplasia, established according to OLGA and OLGIM staging systems, found that with the increase in the severity of chronic atrophic gastritis, the severity of the stages of the OLGA system and the OLGIM system increases. There is a direct, moderate and statistically significant correlation between forms of chronic atrophic gastritis and OLGA stages (ρ = 0.6, p <0.001), a direct, weak and statistically significant correlation between forms of chronic atrophic gastritis and OLGIM stages (ρ = 0.3, p <0.001).
A statistically significant and significant reduction of PG-I and PGR was determined simultaneously with the increase of the OLGA and OLGIM systems stages. The OLGA and OLGIM staging systems classify patients with chronic atrophic gastritis into stages with a high risk of developing gastric cancer, they are the most reliable and powerful systems that allow the recognition of the patient with a higher risk of developing gastric cancer, but their implementation is limited.
Conclusions: The implementation of OLGA and OLGIM systems for the classification and approach of chronic gastritis in medical practice is necessary to minimize the incidence and mortality rates caused by gastric cancer - a condition with an increased frequency. By applying these stratification systems for chronic atrophic gastritis, patients could benefit from appropriate treatment started in a premalignant stage.