Table II.

Antithrombotic use by age

Antithrombotic medication	Overall (N = 2122), n (%)	65-79 y (n = 1645), n (%)	≥80 y (n = 477), n (%)
No aspirin, clopidogrel, or warfarin	254 (12.0)	209 (12.7)	45 (9.4)
Aspirin or clopidogrel alone*	477 (22.5)	372 (22.6)	105 (22.0)
Aspirin and clopidogrel	566 (26.7)	415 (25.2)	151 (31.7)
Warfarin alone	83 (3.9)	62 (3.8)	21 (4.4)
Warfarin + (aspirin or clopidogrel)†	590 (27.8)	478 (29.1)	112 (23.5)
Triple therapy	152 (7.2)	109 (6.6)	43 (9.0)
Antiplatelet therapy alone‡,§	1043 (49.2)	787 (47.8)	256 (53.7)
Warfarin and antiplatelet therapy‡,§	742 (35.0)	587 (35.7)	155 (32.5)
Any aspirin§	1769 (83.4)	1359 (82.6)	410 (86.0)
Any clopidogrel§	734 (34.6)	539 (32.8)	195 (40.9)
Any warfarin§	825 (38.9)	649 (39.5)	176 (36.9)

^*Clopidogrel alone used in 15 (0.7%) patients overall, 14 (0.9%) patients 65 to 79 years old, and 1 (0.2%) patient ≥80 years old.

^†Warfarin + clopidogrel used in 1 (0.0%) patient overall and 1 (0.1%) patient 65 to 79 years old.

^‡Antiplatelet therapy defined as aspirin, clopidogrel, or both.

^§Categories within each division are not mutually exclusive.