Epidemiological study on Helicobacter pylori infection and extragastroduodenal disorders in Polish population

An association between Helicobacter pylori (H. pylori) infection and extra-gastroduodenal disorders (EGDD) is still not clear. The aim of the study was to investigate the relationship between H. pylori infection and the symptoms of coronary artery disease (CAD), facial dermatological changes (FDC), gastroesophageal reflux diseases (GERD), and periodontal diseases (PD) in Polish population. The study was performed between 1996-1999 year on 7060 adult inhabitants of municipal area of Krakow (aged 18-76, mean 46.3 year; 55.8% female, 44.2% male): 2204 subjects with EGDD and 4856 without symptoms of EGDD. Each patient responded to a detailed questionnaire under supervision of medical staff. The H. pylori status was assessed non-invasively using urea breath test (UBT) with capsulated low-dose C-13-UBT (38 mg). Exclusion criteria were: recent H. pylori eradication, treatment with PPI, bismuth and/or antibiotics in the last 4 weeks. Four groups of cases with EGDD symptoms were selected. Within each group exclusively only one of studied symptoms was recorded. The study included 328, 138, 688, and 1050 patients with CAD, FDC, GERD and PD, respectively. For each studied group an age and sex-matched asymptomatic controls were selected (897, 387, 1083, and 2489 control patients). Results: Overall H. pylori infection rate was 69,9% (in 71.4% of 2204 cases and in 69.31% of 4856 controls). In CAD group: 68% of 328 cases were H. pylori (+ve) vs. 70% H. pylori (+ve) of 897 controls. An association was not significant: OR = 0.93 (95% CI, 0.72-1.20). In 138 of FDC cases, 59% were H. pylori (+ve) vs. 71% H. pylori (+ve) in 387 controls showing the lack of positive association; OR = 0.60 (95% CI, 0.42-0.87). In GERD, 69% of 688 cases were H. pylori (+ve) vs. 73% of 1083 H. pylori (+ve) controls and negative association was observed; OR = 0.80 (95% CI, 0.65-1.00). In 1050 of PD cases 75% were H. pylori (+ve) vs. 68% H. pylori (+ve) of 2489 controls; positive association was significant; OR = 1.4 (95% CI, 1.16-1.68). We conclude that in the studied Polish population, no positive association exists between H. pylori positivity and CAD, FDC or GERD possibly due very high overall H. pylori infection rate. The only positive link observed between H. pylori infection and periodontal disease may reflect direct "in situ" H. pylori pathological action of H. pylori in oral cavity. It is not excluded that periodontal diseases may facilitate the H. pylori ore-gastric transmission and colonisation of the bacteria in the digestive tract.