We investigated the seroprevalence of Helicobacter pylori in patients with obstructive sleep apnoea. A prospective clinical study consisting of 19 patients aged 23-72 years with confirmed obstructive sleep apnoea by overnight polysomnography and 36 control subjects aged 25-61 years with no history of obstructive sleep apnoea and gastroesophageal reflux complaints was conducted. Titres of serum H. pylori IgG antibody were assayed by a serum enzyme-linked immunoabsorbant assay. The difference between ...