Association between histological severity of Helicobacter pylori infection and cardiovascular risk scores in the Korean population

Abstract

Background and aims: Although there have been several reports on the association between Helicobacter pylori (HP) infection and cardiovascular disease (CVD), most studies have been done through noninvasive testing such as serologic test or urea breath test. This study investigated the relationship between histological features of HP gastritis and cardiovascular risk scores. Methods: A total of 21,251 subjects (mean age, 43.8 +/- 9.6 years; males, 72.1%) who underwent routine health checkup and gastric biopsy were retrospectively analyzed. The severity of gastritis was assessed using the updated Sydney system (USS). With four different risk predicting algorithms, we calculated Framingham coronary heart disease (CHD) risk score, ATP III revised Framingham CHD risk score, generalized Framingham risk against total CVD, and ACC/AHA 10-year risk of a first hard atherosclerotic-CVD event in each subject. Results: About half of the study subjects (51.2%, n = 10,890) were confirmed to have HP infection. Subjects with HP infection were younger (42.9 +/- 9.0 vs. 44.7 +/- 10.2 years, p < 0.001) than those without. After adjustment for age, most of the estimated 10-year cardiovascular risk increased as the grade of USS elements increased. As the sum of the USS scores increased, all the 4 estimated 10-year cardiovascular risk scores increased proportionally (p < 0.05 for each). Conclusions: The histological features of gastritis assessed using USS were associated with various cardiovascular risk scores. This study provides strong evidence on an association between chronic inflammation and increased cardiovascular risk.