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  • Terapevt Arkh · Feb 2021

    Classical Article

    [Assessment of individual risk of food interactions while taking warfarin].

    • Y P Skirdenko and N A Nikolaev.
    • Omsk State Medical University.
    • Terapevt Arkh. 2021 Feb 15; 93 (2): 187192187-192.

    AimTo develop a questionnaire to assess the individual risk of food interactions in a patient taking warfarin.Materials And MethodsBased on the review of 159 literature sources, a test version of the questionnaire was formed. 196 respondents took part in the pilot part of the study to assess the multiplicity and volume of food consumption. For the initial assessment of the risk limit of the diet, complications of warfarin therapy were registered no earlier than 24 weeks later.ResultsThe final version of the questionnaire included 25 products that are most frequently consumed and significant in relation to the risk of alimentary interactions. The questionnaire contains 2 groups of products: increasing and decreasing the activity of warfarin. The volume and frequency of use of each product is evaluated in points that are calculated as the simple product of weights of frequency and volume, with a minimum value of 0 and maximum of 12. The number of points for each product is calculated separately. The points obtained are summed for a group of products that increase the activity of warfarin, and for a group of products that reduce it, and the overall risk score is calculated. The average number of points for the use of products that affect the activity of warfarin in patients with AF with complications of therapy was 75.7831.97 b. The calculation of the design validity of the questionnaire (Cronbachs a=0.864) showed a good level for confirmation purposes.ConclusionA specialized questionnaire was developed, implemented as a computer program, to assess the significance of food preferences in ensuring the safety and effectiveness of warfarin therapy. Further research is required to determine the risk limit of alimentary interactions of warfarin, but now this questionnaire can be used to monitor the uniformity of consumption of products that affect its activity. The authors suggested using a questionnaire for assessing the risk of food interactions as one of the factors influencing the decision to prescribe warfarin to patients with insufficient adherence to lifestyle modification.

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