Table 3 Rate and risk of excessive or any blood product transfusion according to antiplatelet drug prescription before coronary artery bypass graft surgery

Excessive transfusion*

Neither

260 (52.4)

1.0

1.0

Aspirin alone

58 (55.8)

1.1 (0.8–1.8)

1.0 (0.6–1.6)

Clopidogrel alone

6 (54.6)

1.1 (0.3–3.6)

0.7 (0.2–2.5)

Aspirin and clopidogrel

33 (71.7)

2.3 (1.2–4.5)

2.2 (1.1–4.3)

Any transfusion

Neither

300 (60.5)

1.0

1.0

Aspirin alone

70 (66.7)

1.3 (0.8–2.0)

1.1 (0.7–1.7)

Clopidogrel alone

9 (81.8)

3.0 (0.6–13.8)

1.8 (0.4–9.2)

Aspirin and clopidogrel

36 (78.3)

2.4 (1.2–4.9)

2.1 (1.0–4.5)