title: Improving thromboprophylaxis in elderly patients with non-valvular atrial fibrillation.
abstract: BACKGROUND
  Non-valvular atrial fibrillation (NVAF) is more common in elderly people, and is one of the most powerful independent risk factors predisposing to stroke. This risk increases with age. Despite evidence that full dose anticoagulation reduces this risk, and Scottish Intercollegiate Guidelines, warfarin is still being under prescribed, especially in elderly individuals.
  
  
  OBJECTIVE
  To audit warfarin prescribing in elderly hospital patients with NVAF, and assess whether audit feedback and evidence based guidelines improved warfarin usage.
  
  
  METHODS
  Discharge summaries and medical notes were reviewed, and warfarin prescribing identified, for all patients with NVAF discharged from the Medicine for the Elderly Department between January 2001 and December 2002. This was done before (16 months) and after (7 months) audit results were presented at a departmental meeting, and evidence basedguidelines were produced.
  
  
  RESULTS
  Warfarin prescribing significantly increased from 38/121 (31.4%) prior to audit feedback and the introduction of guidelines to 30/55 (54.5%), Chi2-test, p < 0.01.
  
  
  CONCLUSIONS
  Older patients with NVAF were under prescribed warfarin. Audit feedback and the introduction of evidence based guidelines significantly increased anticoagulation usage.
authors.affiliation: Section of Ageing and Health, Department of Medicine, Ninewells Hospital and Medical School, Dundee. Douglas.Lowdon@tpct.scot.nhs.uk
authors.forename: D W
authors.initials: DW
authors.lastname: Lowdon
authors.forename: J R
authors.initials: JR
authors.lastname: Harper
authors.forename: N D
authors.initials: ND
authors.lastname: Gillespie
mesh_terms: D000368:Aged; D000925:Anticoagulants / Q000008:administration & dosage*; D001281:Atrial Fibrillation / Q000150:complications*; D000075202:Contraindications; D006801:Humans; D008485:Medical Audit; D020521:Stroke / Q000209:etiology / Q000517:prevention & control*; D013923:Thromboembolism / Q000209:etiology / Q000517:prevention & control*; D014859:Warfarin / Q000008:administration & dosage*
chemical_list: D000925:Anticoagulants; D014859:Warfarin