From Gut:
... after adjustment for the covariates age, sex, erosive oesophagitis, hiatus hernia, degree of gastritis, and severity of symptoms at baseline, H pylori eradication was the only predictor of treatment failure.
This is quite interesting. I don't have access to full-text of this article - so let's not jump on this bandwagon just yet - but it's an interesting topic - and a common clinical problem.