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Time in Therapeutic Range (TTR)

A randomized 6-month study of 365 patients on Coumadin/warfarin therapy demonstrated that those patients who self-tested were in range 56% of the time while patients who received usual care were in range only 32% of the time.1









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1 Beyth RJ, et al. A multicomponent intervention to prevent major bleeding complications in older patients receiving warfarin. Ann Intern Med. 2000;133:687-695.