resources from my career
Conclusion: Time in Therapeutic Range does not always lead to lower stroke rate
In a group of patients I recently studied, patients with the lowest TTR % (as calculated using the Rosendaal Method in the patient's first year on Warfarin) had the lowest stroke risk.
Also, I found that patients with the most frequent testing had the lowest TTR.
This study consisted of 210 NVAF patients who are managed by our HMO. Fifty-seven of the patients (37.25%) have their INR testing and Warfarin dosing adjustments through our Anticoagulation Clinic while the other 153 patients have this choreographed by their PCP's office.
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