Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Peptic ulcers
RCT	100 H pylori-positive people requiring NSAID treatment and without any history of peptic ulceration or gastric surgery	Peptic ulcer 8 weeks 3/45 (7%) with 1-week triple eradication regimen 12/47 (26%) with no eradication treatment	P = 0.01	Effect size not calculated	triple eradication regimen
RCT 4-armed trial	832 people with H pylori and no history of ulcer, and requiring treatment with an NSAID	Peptic ulcers 5 weeks 2/161 (1%) with 1-week triple eradication regimen 10/171 (6%) with placebo for 5 weeks	P <0.05 for 1-week triple eradication regimen v placebo Analysis not by intention to treat	Effect size not calculated	triple eradication regimen
RCT 4-armed trial	832 people with H pylori and no history of ulcer, and requiring treatment with an NSAID	Peptic ulcers 5 weeks 2/173 (1%) with 1-week triple eradication regimen plus 4 weeks of omeprazole 10/171 (6%) with placebo for 5 weeks	P <0.05 for 1-week triple eradication regimen plus 4 weeks of omeprazole v placebo Analysis not by intention to treat	Effect size not calculated	triple eradication regimen