• Annette Kristiansen, Linn Brandt, Thomas Agoritsas, Elie A Akl, Eivind Berge, Anne Flem Jacobsen, Lars-Petter Granan, Sigrun Halvorsen, Gordon Guyatt, and Per Olav Vandvik.
• Chest. 2014 Sep 1;146(3):735-61.

BackgroundThe Antithrombotic Therapy and the Prevention of Thrombosis, 9th Edition: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines (AT9) represent trustworthy international guidelines for antithrombotic treatment and thromboprophylaxis. We describe major changes to the format and content resulting from applying new strategies for guideline adaptation and dissemination.MethodsA Norwegian guideline panel of 46 experts completed a structured and systematic adaptation process, updated the recommendations based on new evidence, and rewrote the recommendations in an electronic multilayered presentation format. We published the adapted guideline using the web-based Making GRADE the Irresistible Choice Guideline Authoring and Publication Platform.ResultsWe applied a novel presentation format to 333 recommendations from 11 of the 15 management chapters in AT9 and condensed and restructured them into 249 recommendations in a multilayered format. We added additional relevant information, such as 29 best-practice statements about new oral anticoagulants and practical information sections for 121 recommendations. Common reasons for modifications included feasibility of the recommendations in a national context, disagreement with applied baseline risk estimates, and reevaluation of the balance between the benefits and harms of interventions in relation to assumed typical patient preferences and values. The adapted guideline was published and disseminated online in November 2013.ConclusionsNew strategies for adapting, updating, and disseminating trustworthy guidelines proved feasible and will provide Norwegian health-care professionals and patients with up-to-date guidance tailored to national circumstances.

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