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INR testing in stable patients: Time to decrease frequency?Mar 2, 2012 09:30 EST
Dr Sam Schulman's recent study calls into question the need to test INR every four weeks in stable patients. It's costly and perhaps unwarranted, as indicated by his data, which showed testing on a 12-week cycle to be noninferior to the standard practice. Is it now appropriate to consider relaxing the frequency of INR testing in this set of patients? What are your thoughts?
Schulman S, Parpia S, Stewart C, et al. Warfarin dose assessment every 4 weeks versus every 12 weeks in patients with stable international normalized ratios. Ann Intern Med 2011; 155:653-659. Available here.