Treating Helicobacter pylori infection in primary care patients with uninvestigated dyspepsia: the Canadian adult dyspepsia empiric treatment---Helicobacter pylori positive (CADET-Hp) randomised controlled trial

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Abstract
Objective: To determine whether a “test for Helicobacter pylori and treat” strategy improves symptoms in patients with uninvestigated dyspepsia in primary care. Design: Randomised placebo controlled trial. Setting: 36 family practices in Canada. Participants: 294 patients positive for H pylori (13C- urea breath test) with symptoms of dyspepsia of at least moderate severity in the preceding month. Intervention: Participants were randomised to twice daily treatment for 7 days with omeprazole 20 mg, metronidazole 500 mg, and clarithromycin 250 mg or omeprazole 20 mg, placebo metronidazole, and placebo clarithromycin. Patients were then managed by their family physicians according to their usual care. Main outcome measures: Treatment success defined as no symptoms or minimal symptoms of dyspepsia at the end of one year. Societal healthcare costs collected prospectively for a secondary evaluation of actual mean costs. Results: In the intention to treat population (n=294), eradication treatment was significantly more effective than placebo in achieving treatment success (50% v 36%; P=0.02; absolute risk reduction=14%; number needed to treat=7, 95% confidence interval 4 to 63). Eradication treatment cured H pylori infection in 80% of evaluable patients. Treatment success at one year was greater in patients negative for H pylori than in those positive for H pylori (54% v 39%; P=0.02). Eradication treatment reduced mean annual cost by $C53 (86 to 180) per patient. Conclusions: A “test for H pylori with 13C-urea breath test and eradicate” strategy shows significant symptomatic benefit at 12 months in the management of primary care patients with uninvestigated dyspepsia. What is already known on this topic Dyspepsia is a common problem in primary health care, although controversy exists about its definition Studies of H pylori eradication in patients with uninvestigated dyspepsia have shown reduced need for endoscopy and thus significant cost savings compared with a strategy of prompt endoscopy The “test for H pylori and treat” strategy has been recommended for uninvestigated dyspepsia, but there have been no randomised controlled trials showing improvement in symptoms What this study adds When given eradication treatment in primary care, H pylori positive patients with uninvestigated dyspepsia show improvement in overall dyspepsia symptoms at 12 months This supports the “test for H pylori and treat” strategy