Reports of strong associations in small observational studies without appropriate adjustment for potential confounding factors were not generally confirmed by larger and better- design ed studies .
The available evidence indicates that there is no strong association between H pylori and dyspepsia , but there is insufficient evidence to confirm or refute the existence of a modest association
BACKGROUND Previous studies have yielded conflicting results and substantial uncertainty about any independent association of Helicobacter pylori infection with dyspepsia , and about any benefits of antibiotic treatments for nonulcer or uninvestigated dyspepsia .
OBJECTIVES To perform a systematic review of the literature to determine whether chronic infection with H pylori is relevant to nonulcer or uninvestigated dyspepsia .
Campylobacter pylori and non-ulcer dyspepsia.
Non-ulcer dyspepsia ( NUD ) is a poorly understood syndrome often present in association with gastritis . Among patients undergoing gastroscopy  , some with NUD have a gastric mucosa colonized by the campylobacter-like organism , Campylobacter pylori . We therefore studied prospect ively 55 consecutive patients with NUD and 15 normal controls to determine the prevalence of C. pylori organisms , and to investigate their association with histological gastritis , macroscopic evidence of gastritis , sex , smoking , alcohol consumption , and dyspeptic symptoms . We found a 45.4 % prevalence in NUD patients which was statistically significantly higher than the 13.33 % prevalence in the control group ( p less than 0.05 ) . We also found a close association between C. pylori and microscopic evidence of gastritis ( p less than 0.001 ) , male sex ( p less than 0.001 ) , and postpr and ial bloating ( p less than 0.05 ) . We did not find any significant association between C. pylori and macroscopic evidence of gastritis , smoking , alcohol consumption and other dyspeptic symptoms . Our findings suggest that C. pylori may play a pathogenic role in NUD
Reports of strong associations in small observational studies without appropriate adjustment for potential confounding factors were not generally confirmed by larger and better- design ed studies .
The available evidence indicates that there is no strong association between H pylori and dyspepsia , but there is insufficient evidence to confirm or refute the existence of a modest association
BACKGROUND Previous studies have yielded conflicting results and substantial uncertainty about any independent association of Helicobacter pylori infection with dyspepsia , and about any benefits of antibiotic treatments for nonulcer or uninvestigated dyspepsia .
OBJECTIVES To perform a systematic review of the literature to determine whether chronic infection with H pylori is relevant to nonulcer or uninvestigated dyspepsia .