Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Peptic ulcers
RCT 4-armed trial	832 people with H pylori and no history of ulcer, requiring treatment with an NSAID	Peptic ulcers 5 weeks 2/161 (1%) with 1-week triple eradication regimen 2/173 (1%) with 1-week triple eradication regimen plus 4 weeks of omeprazole 0/155 (0%) with omeprazole alone for 5 weeks	Reported no significant difference among active treatment groups P value not reported Analysis not by intention to treat		Not significant