The Operative Link on Gastritis Assessment (OLGA) system as a marker for gastric cancer and dysplasia in a Colombian population at risk: A multicenter study

Yeison Harvey Carlosama , Claudia Patricia Acosta , Carlos Hernán Sierra , Carol Yovanna Rosero , Harold Jofre Bolaños, .

Keywords: Helicobacter pylori, stomach neoplasms, precancerous conditions, gastritis, atrophic

Abstract

Introduction. The OLGA system has been proved to be useful in Asia and Europe as a risk marker of gastric cancer. However, its usefulness in high-risk populations in Colombia is still unknown.
Objective. To assess potential associations between the OLGA staging system and an increased risk of gastric cancer and dysplasia in a high-risk Colombian population and to establish diagnostic capacity of the scale to assess the risk.
Materials and methods. We carried out a multicenter study including patients with cancer and dysplasia (cases) and patients with atrophy and intestinal metaplasia (controls). A total of 506 patients were recruited from three centers in an area with a high risk population in Colombia. The endoscopic and histopathologic studies were evaluated according to the Sydney system and the OLGA staging system proposed by Rugge. The effect of each variable on the disease (gastric cancer and dysplasia) was evaluated using bivariate and multivariate models. Statistical significance was set considering a p value inferior to 0.05.
Results. Advanced stages of the OLGA system (III-IV) were associated with a higher risk of dysplasia and gastric cancer (adjusted OR = 8.71; CI95% = 5.09-14.9; p=0.001), sensitivity=54.9%, specificity=89.3% and positive likelihood ratio=5.17.
Conclusions. The OLGA staging system is a risk marker for gastric cancer and dysplasia in the studied population. We recommend its implementation to improve the timely
diagnosis and follow-up of patients with the highest cancer risk.

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How to Cite
1.
Carlosama YH, Acosta CP, Sierra CH, Rosero CY, Bolaños HJ. The Operative Link on Gastritis Assessment (OLGA) system as a marker for gastric cancer and dysplasia in a Colombian population at risk: A multicenter study. biomedica [Internet]. 2023 Dec. 29 [cited 2024 May 11];43(Sp. 3):30-4. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/6995

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2023-12-29

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