Review Article

Dabigatran, Rivaroxaban, or Apixaban versus Warfarin in Patients with Nonvalvular Atrial Fibrillation: A Systematic Review and Meta-Analysis of Subgroups

Table 2

Characteristics of the patients and events (overall study population).

Drug, trialDabigatran RE-LY [22, 48] Rivaroxaban ROCKET [23, 49] Apixaban ARISTOTLE [24, 50] -value*

No in sample181131426418201
Patients characteristics
 Age (years)72 (mean)73 (median)70 (median)
 Male gender11514 (64%)8604 (60%)5660 (65%)<0.0001
 CHADS2 (mean ± standard deviation) <0.0001
 CHADS2 ≥ 212337 (68%)14261 (100%)12018 (66%)<0.0001
 CHADS2 = 15775 (32%)3 (0%)6183 (34%)<0.0001
 Prior stroke/transient ischemic attack3623 (20%)7468 (55%)3436 (19%)<0.0001
 Congestive heart failure5793 (32%)8908 (63%)6451 (35%)<0.0001
 Hypertension14283 (79%)12910 (91%)15916 (87%)<0.0001
 Age ≥ 75 years7238 (40%)6229 (43%)5678 (31%)<0.0001
 Diabetes4221 (23%)5695 (40%)4547 (25%)<0.0001
 Prior myocardial infarction3005 (17%)2468 (17%)2585 (14%)<0.0001
 Patients in centers with TTR ≥ 65%8950 (49%)3493 (24%)9046 (50%)<0.0001
 Patients recruited in Europe6770 (37%)7582 (53%)7343 (40%)<0.0001
 Patients with CrCl < 50 mL/min3505 (19%)2986 (21%)3017 (17%)<0.0001
Type of atrial fibrillation
 Permanent-persistent12164 (67%)11548 (81%)15412 (85%)<0.0001
 Paroxysmal5943 (33%)2514 (18%)2786 (15%)<0.0001
Antithrombotic treatment at baseline
 VKA8989 (50%)8904 (62%)10401 (57%)<0.0001
 Acetylsalicylic acid7198 (40%)5205 (37%)5632 (31%)<0.0001
Event rate in the control group
 Total stroke or SEE202 (3.35%)306 (4.29%)265 (2.92%)0.0001
 Ischemic stroke143 (2.37%)226 (3.17%)175 (1.93%)<0.0001
 Hemorrhagic stroke45 (0.75%)57 (0.80%)78 (0.75%)0.9968
 SEE16 (0.27%)25 (0.35%)15 (0.17%)0.2367
 Intracranial bleeding90 (1.49%)84 (1.18%)122 (1.34%)0.6421
 Major bleeding421 (6.99%)386 (5.41%)462 (5.09%)<0.0001
 Death487 (8.09%)632 (8.86%)669 (7.37%)0.0168
 Treatment discontinuation1150 (19%)2468 (35%)2732 (30%)<0.0001

Chi-square test for categorical variables and one-way analysis of variance (ANOVA) for continuous variables.
Treated patients that received assigned study drug but did not complete study.
CrCl: creatinine clearance; SEE: systemic embolic event; TTR: time in therapeutic range; VKA: vitamin K antagonist.