title: Acid-suppressing drugs and gastroesophageal reflux disease as risk factors for acute pancreatitis--results from a Swedish Case-Control Study.
abstract: OBJECTIVE
  To study risk factors for acute pancreatitis, here with emphasis on gastro-intestinal diseases and their treatments.
  
  
  METHODS
  Population based case-control study covering four areas in Sweden encompassing 2.2 million inhabitants. Included were 462 incident cases of acute pancreatitis aged 20-85 years, hospitalized from 1 January 1995-31 May 1998, and 1,781 unmatched controls randomly selected from the study base using a population register. Information was captured from medical records and structured telephone interviews.
  
  
  RESULTS
  Current use of H(2) antagonists starting within 6 months of index-date was associated with acute pancreatitis with an adjusted OR of 4.9 (95% confidence interval (CI) 1.6-15), and current use of proton pump inhibitors (PPIs) with an adjusted OR of 3.2 (95%CI 1.4-7.4). For both drug classes, the ORs tended to be higher at higher doses. Gastritis/gastro-esophageal reflux disease (GERD) within the last 12 months not treated with PPIs or H(2)-antagonists and inflammatory bowel disease (IBD) not treated with anti-inflammatory or immunosuppressive drugs were associated with development of acute pancreatitis with adjusted odds ratios (OR) of 1.9 (95%CI 1.2-3.0) and 5.1 (95%CI 2.0-13) respectively.
  
  
  CONCLUSIONS
  Current IBD without treatment and gastritis/GERD without treatment were found to be associated with increased risks to develop acute pancreatitis but the nature of the latter association needs to be further evaluated. On balance, we judge that the observed associations between current use of H(2)-antagonists and PPIs and increased risk of acute pancreatitis are unlikely to be explained by bias.
authors.affiliation: Medical Products Agency, Uppsala, Sweden. Anders.Sundstrom@Mpa.se
authors.forename: Anders
authors.initials: A
authors.lastname: Sundström
authors.forename: Kerstin
authors.initials: K
authors.lastname: Blomgren
authors.forename: Lars
authors.initials: L
authors.lastname: Alfredsson
authors.forename: Bengt-Erik
authors.initials: BE
authors.lastname: Wiholm
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000863:Antacids / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D016022:Case-Control Studies; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D005260:Female; D005764:Gastroesophageal Reflux / Q000150:complications* / Q000188:drug therapy*; D006635:Histamine H2 Antagonists / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D015212:Inflammatory Bowel Diseases / Q000150:complications / Q000188:drug therapy; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000453:epidemiology / Q000209:etiology*; D017891:Pharmacoepidemiology; D054328:Proton Pump Inhibitors; D012042:Registries; D012307:Risk Factors; D013548:Sweden / Q000453:epidemiology
chemical_list: D000863:Antacids; D004791:Enzyme Inhibitors; D006635:Histamine H2 Antagonists; D054328:Proton Pump Inhibitors