Background. Helicobacter pylori (HP) is a causative factor for several gastrointestinal diseases. A HP seropositive antibody titer (i.e., ≥10 U/mL), a threshold indicating an HP infection, is known to be associated with changes in lipid metabolism. There is evidence that HP infection can be found in some individuals with HP antibody titer of between 3 and 9.9 U/mL (termed as “negative-high titer”). However, it is unknown about the relationship between HP negative-high titer and lipid metabolism. The present study aimed to quantify the association between HP negative-high antibody titer and lipid profiles. Materials and Methods. We surveyed 2,478 people who underwent a Ningen Dock examination and had serological HP antibody data, from May 2016 to December 2020 at National Center for Global Health and Medicine, Tokyo, Japan. Multiple regression models were used to quantify the association between HP antibody titer and serum lipid levels. Results. The adjusted odds ratio (95% confidence interval [CI]) for dyslipidemia in HP negative-high and positive titer was 1.24 (0.96, 1.79) and 1.36 (1.10, 1.68), respectively, compared with HP negative-low titer; p trend =0.005. The adjusted mean (95% CI) of high-density lipoprotein cholesterol (HDL-C) in HP negative-low, negative-high, and positive titer was 58.78 (57.86–59.71), 55.30 (53.70–56.91), and 53.76 (52.90–54.63) mg/dL, respectively; p trend <0.001. Higher HP antibody titers were also associated with higher ratio of low-density lipoprotein cholesterol (LDL-C) to HDL-C, but not triglycerides, or total cholesterols. Conclusion. The present cross-sectional study suggests that a HP negative-high antibody titer may be associated with dyslipidemia, HDL-C, and LDL-C to HDL-C ratio among Japanese Ningen Dock’s participants.
Benefiting from the Japanese Government's welcoming of foreign visitors, our facility was able to accept and respond to large number of foreign tourists (1,493) to undergo a comprehensive health checkup (Ningen Dock) in 2019. However, coronavirus disease 2019 (COVID-19) completely precluded the acceptance of tourists for two years starting in from 2020. In August 2020, our hospital policy was changed to actively accept foreign residents in Japan for comprehensive health checkups. In this article, we analyzed the foreign residents who use our facility in detail and we investigated the characteristics of foreign residents from the viewpoint of a comprehensive health checkup.
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