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Race/Ethnicity and Birthplace as Risk Factors for Gastric Intestinal Metaplasia in a Multiethnic United States Population.

Tan MC, Jamali T, Nguyen TH, Galvan A, Sealock RJ, Khan A, Zarrin-Khameh N, Holloman A, Kampagianni O, Ticas DH, Liu Y, El-Serag HB, Thrift AP. Race/Ethnicity and Birthplace as Risk Factors for Gastric Intestinal Metaplasia in a Multiethnic United States Population. The American journal of gastroenterology. 2022 Feb 1; 117(2):280-287.

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Abstract:

INTRODUCTION: Several US subgroups have increased risk of gastric cancer and gastric intestinal metaplasia (GIM) and may benefit from targeted screening. We evaluated demographic and clinical risk factors for GIM and examined the interaction between race/ethnicity and birthplace on GIM risk. METHODS: We identified patients who had undergone esophagogastroduodenoscopy with gastric biopsy from 3/2006-11/2016 using the pathology database at a safety net hospital in Houston, Texas. Cases had GIM on 1 gastric biopsy histopathology, whereas controls lacked GIM on any biopsy. We estimated odds ratios and 95% confidence intervals (CI) for associations with GIM risk using logistic regression and developed a risk prediction model of GIM risk. We additionally examined for associations using a composite variable combining race/ethnicity and birthplace. RESULTS: Among 267 cases with GIM and 1,842 controls, older age (vs < 40 years: 40-60 years adjusted odds ratios (adjORs) 2.02; 95% CI 1.17-3.29; > 60 years adjOR 4.58; 95% CI 2.61-8.03), Black race (vs non-Hispanic White: adjOR 2.17; 95% CI 1.31-3.62), Asian race (adjOR 2.83; 95% CI 1.27-6.29), and current smoking status (adjOR 2.04; 95% CI 1.39-3.00) were independently associated with increased GIM risk. Although non-US-born Hispanics had higher risk of GIM (vs non-Hispanic White: adjOR 2.10; 95% CI 1.28-3.45), we found no elevated risk for US-born Hispanics (adjOR 1.13; 95% CI 0.57-2.23). The risk prediction model had area under the receiver operating characteristic of 0.673 (95% CI 0.636-0.710) for discriminating GIM. DISCUSSION: We found that Hispanics born outside the United States were at increased risk of GIM, whereas Hispanics born in the United States were not, independent of Helicobacter pylori infection. Birthplace may be more informative than race/ethnicity when determining GIM risk among US populations.





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