Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Ulcer healing
RCT	195 people with H pylori, using NSAIDs, and with bleeding peptic ulcers	Healing rate 8 weeks 77/93 (83%) with eradication treatment (bismuth subcitrate plus tetracycline plus metronidazole plus omeprazole) 88/102 (86%) with omeprazole alone	P = 0.50		Not significant