Helicobacter pylori infection prevalence in ambulatory settings in 2017-2019 in RUSSIA: The data of real-world national multicenter trial.

C-UBT testing of primary care visitors in Russia is lower than expected (38.8%). The highest prevalence of H. pylori infection found in the Southern and the North Caucasian federal districts of Russia and in the age group of 41-50 years old. This study was registered at clinicaltrials.gov (NCT04892238).