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1.
Budnitz DS, Lovegrove MC, Shehab N, Richards CL. Emergency hospitalizations for adverse drug events in older Americans.  N Engl J Med. 2011;365(21):2002-201222111719PubMedGoogle ScholarCrossref
2.
Tang EO, Lai CS, Lee KK, Wong RS, Cheng G, Chan TY. Relationship between patients' warfarin knowledge and anticoagulation control.  Ann Pharmacother. 2003;37(1):34-3912503930PubMedGoogle ScholarCrossref
3.
Wofford JL, Wells MD, Singh S. Best strategies for patient education about anticoagulation with warfarin: a systematic review.  BMC Health Serv Res. 2008;8:4018275605PubMedGoogle ScholarCrossref
4.
Estrada CA, Hryniewicz MM, Higgs VB, Collins C, Byrd JC. Anticoagulant patient information material is written at high readability levels.  Stroke. 2000;31(12):2966-297011108757PubMedGoogle ScholarCrossref
5.
Wolf MS, Davis TC, Shrank WH, Neuberger M, Parker RM. A critical review of FDA-approved medication guides.  Patient Educ Couns. 2006;62(3):316-32216884888PubMedGoogle ScholarCrossref
6.
Wilson FL, Racine E, Tekieli V, Williams B. Literacy, readability and cultural barriers: critical factors to consider when educating older African Americans about anticoagulation therapy.  J Clin Nurs. 2003;12(2):275-28212603561PubMedGoogle ScholarCrossref
7.
Diug B, Evans S, Lowthian J,  et al.  The unrecognized psychosocial factors contributing to bleeding risk in warfarin therapy.  Stroke. 2011;42(10):2866-287121836093PubMedGoogle ScholarCrossref
8.
Platt AB, Localio AR, Brensinger CM,  et al.  Risk factors for nonadherence to warfarin: results from the IN-RANGE study.  Pharmacoepidemiol Drug Saf. 2008;17(9):853-86018271059PubMedGoogle ScholarCrossref
Research Letter
April 8, 2013

Patient Information About Warfarin: An Assessment of Accuracy and Readability

Author Affiliations

Author Affiliations: Departments of Pharmacy (Ms Diamantouros and Dr Bartle) and Medicine (Dr Geerts), Sunnybrook Health Sciences Centre, and Centre for Patient Safety (Dr Geerts), University of Toronto, Toronto, Ontario, Canada.

JAMA Intern Med. 2013;173(7):582-583. doi:10.1001/jamainternmed.2013.2781

Oral vitamin K antagonists, such as warfarin, are among the most commonly prescribed and potentially dangerous classes of medications.1 For many high-risk drugs, such as warfarin, there is a strong link between patient knowledge about the medication and their safe use.2 For warfarin, provision of high-quality education improves compliance, increases time in the therapeutic range, and leads to a reduction in complications.3 Patients are largely educated about warfarin through written information sheets provided by their pharmacies. Therefore, it is critical that these sheets are both accurate and understandable. The objectives of this study were to assess the content (accuracy and completeness) and reading level of patient education sheets (PES) about warfarin provided to patients by community pharmacies in Ontario, Canada, and by pharmaceutical producers of this high-risk drug.

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