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Table 1 Characteristics of Patients with AF classified based on Warfarin Use

From: Examining warfarin underutilization rates in patients with atrial fibrillation: Detailed chart review essential to capture contraindications to warfarin therapy

Characteristics Received Warfarin n = 199 Did Not Receive Warfarin n = 165 p value
Age, years, mean 76.3 ± 11.3 81.3 ± 10.3 < 0.001*
Age 75 ≥ y, n (%) 125 (62.8) 134 (81.2) < 0.001*
AA Race, n (%) 74 (37.2) 82 (49.7) 0.016*
Women, n (%) 76 (38.2) 79 (47.9) 0.063
CAD, n (%) 92 (46.2) 87 (52.7) 0.217
Mean CHADS 2 Score ± S.D 2.8 ± 1.3 3.2 ± 1.3 0.004*
CHADS 2 Score- 3 or greater (%) 111 (56) 116 (70) 0.004*
Chads 2 Score    
No. of points, n (%)    
0 3 (1.5) 2 (1)  
1 22 (11) 12 (7)  
2 63 (32) 35 (21)  
3 59 (30) 58 (35)  
4 32 (16) 28 (17)  
5 15 (7.5) 22 (14)  
6 5 (2.5) 8 (5)  
Heart Failure, n (%) 120 (60.3) 103 (62.4) 0.679
Diabetes, n (%) 68 (34.2) 66 (40.0) 0.251
Hypertension, n (%) 179 (90.0) 149 (90.3) 0.911
Prior Stroke, n (%) 47 (23.6) 43 (26.1) 0.591
  1. Abbreviations: AA- African American, CAD- Coronary Artery Disease, CHADS2- C-cardiac failure, H-hypertension, A-age > 75 years, D- diabetes mellitus, S- stroke, S.D- Standard deviation
  2. *Statistically significant, p < 0.05