RT Journal Article SR Electronic T1 Combined analysis of the ORCHID and OCAY studies: does eradication of Helicobacter pylori lead to sustained improvement in functional dyspepsia symptoms? JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP iv26 OP iv30 DO 10.1136/gut.50.suppl_4.iv26 VO 50 IS suppl 4 A1 S J O Veldhuyzen van Zanten A1 N J Talley A1 A L Blum A1 E Bolling-Sternevald A1 M Sundin A1 O Junghard YR 2002 UL http://gut.bmj.com/content/50/suppl_4/iv26.abstract AB Currently, one of the most important unresolved questions concerning Helicobacter pylori is whether eradication of the organism leads to a sustained improvement in symptoms in patients diagnosed with functional (non-ulcer) dyspepsia. Recently, two very similar studies, the ORCHID and OCAY studies, have been completed and the combined results of these two multicentre, multinational, randomised, double blind, controlled clinical trials are reviewed.