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Table 4 INR outcomes in the study period

From: Anticoagulant use for the prevention of stroke in patients with atrial fibrillation: findings from a multi-payer analysis

  IMS MarketScan Commercial MarketScan Medicare Optum Medicaid
All patients, N 30,757 21,976 38,643 9,120 4,901
INR frequency of occurrence: total warfarin patient population      
N (%) 6,452/10,194 (63%) 5,536/6,372 (87%) 8,083/14,563 (56%) 2,002/3,159 (63%) 775/803 (97%)
Average number of unique INRs per month of warfarin treatment      
Unique INRs per month 0.72 1.02 0.51 0.62 2.05
Monthly INR quality ratio      
Quality ratio 0.38 0.53 0.30 0.36 0.64
  1. INR – International Normalized Ratio.