TTR (Time in Therapeutic Range)

Time in Therapeutic Range (TTR) is a measure used to assess how well a person's blood thinner levels (such as warfarin) stay within the target range that effectively prevents blood clots without causing bleeding. It reflects the percentage of time a patient’s blood test results remain within the desired therapeutic window. A higher TTR indicates consistent, proper anticoagulation control, reducing risks of clotting or bleeding complications. Monitoring TTR helps healthcare providers optimize medication dosing and improve patient safety in managing blood thinning therapy.