Track topics on Twitter Track topics that are important to you
Warfarin is a blood thinner with a variable effect and requires regular blood monitoring and dose adjustments. Some family practices do not have the facilities or funding to use commercial tools than can assist with stabilizing the effect of warfarin. The investigators will test whether a simple and cost-free dosing tool can help these practices to improve warfarin management.
If this simple tool improves warfarin management, it will be freely available for practices in Canada and around the world. This will help physicians who have no access to more costly and/or complicated tools improve their warfarin dosing practice in a systematic fashion, and thereby maximize the health benefit of warfarin.
Warfarin reduces the risk of thromboembolism, but requires regular blood monitoring to keep the international normalized ration (INR) within a narrow therapeutic range to achieve maximum benefits. A low proportion of time spent within the therapeutic INR range, (TTR) is associated with reduced warfarin efficacy and potentially harmful results. To optimize TTR, international guidelines recommend the use of systematic evidence-based dosing methods (anticoagulation clinic, computerized systems, manual algorithm and patient self-management). A survey in the Hamilton area revealed that half of family physicians manage warfarin dosing without assistance from an evidence-based method. The simple manual dosing algorithm is a simple tool that helped increase the TTR at the Hamilton General Hospital's anticoagulant clinic to an excellent 73% among patients with target INR range 2-3. We will test whether the simple dosing algorithm can help to improve warfarin dosing of family physicians who are not assisted by evidence-based methods. We will randomize family practices to either use the simple dosing algorithm or to manage warfarin dosing as usual, to test whether the simple dosing algorithm achieves a superior TTR.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment
Caroline Medical Group
Population Health Research Institute
Published on BioPortfolio: 2014-08-27T03:18:10-0400
Individuals taking warfarin often need frequent dose changes as the international normalized ratio (INR) gets too high or too low which could result in a higher risk of thromboembolism, bl...
The aim of this study is to perform a randomized trial comparing the use of the algorithm, with dosing of warfarin in standard manual dosage clinical practice, in a high quality anticoagul...
This study compares the clinical effectiveness of a new algorithm (model-based warfarin dosing) with standard practice (doctor's own judgement and intuition) designed to determine the most...
The purpose of this study is to determine whether DNA analysis improves the efficiency of dosing and safety in patients who are being started on warfarin therapy.Warfarin, a blood thinner ...
The study is a national multicenter prospective observational study, including 200 patients. The main purpose of this study is to explore in more detail the influence of genetic variabilit...
Multiple linear regression (MLR) and machine learning techniques in pharmacogenetic algorithm-based warfarin dosing have been reported. However, performances of these algorithms in racially diverse gr...
Clinical trials of genotype-guided dosing of warfarin have yielded mixed results, which may in part reflect ethnic differences among study participants. However, no previous study has compared genotyp...
Warfarin is a drug normally used in the prevention of thrombosis and the formation of blood clots. The dosage of warfarin is strongly affected by genetic variants of CYP2C9 and VKORC1 genes. Current t...
This study is aimed at developing a novel admixture-adjusted pharmacogenomic approach to individually refine warfarin dosing in Caribbean Hispanic patients.
Dosing guidelines for immunoglobulin treatment in neurological disorders do not consider variations in immunoglobulin half-life or between patients. Individualisation of therapy could optimize clinica...
An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide.
Measurable biological parameters that serve for drug development, safety and dosing (DRUG MONITORING).
A coumarin that is used as an anticoagulant. Its actions and uses are similar to those of WARFARIN. (From Martindale, The Extra Pharmacopoeia, 30th ed, p233)
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
A coumarin that is used as an anticoagulant. It has actions similar to those of WARFARIN. (From Martindale, The Extra Pharmacopoeia, 30th ed, p226)