Table 4. Warfarin utilization among older adults (≥65 years) undergoing dialysis with newly diagnosed atrial fibrillation, who initiated warfarin within 30 days of atrial fibrillation discharge.

	Warfarin initiators
Medication utilization characteristics
Number of warfarin prescriptions per user, median (IQR)	6 (2–14)
Total quantity dispensed per user, median (IQR)	231 (90–532)
Total days of supply per user, median (IQR)	180 (63–460)
Medication utilization measures
Discontinuation, %	46.8
Median time to discontinuation, days, median (IQR)	257 (165–444)
Switching to dabigatran, rivaroxaban, apixaban, %	0.5