Table 2 Low dose aspirin versus control and the effect on saphenous vein graft patency.
| Study | Initiation of aspirin | Daily aspirin dose | Timing of angiography (months) | Total number of anastomoses | Aspirin % occluded | Control % occluded |
|---|---|---|---|---|---|---|
| Lorenz et al, 1984 | 2 h after CABG | 100 mg | 4 | 138 | 19 | 35 |
| Goldman et al, 1989 | 12 h before CABG | 325 mg | 12 | 685 | 13 | 23 |
| Sanz et al, 1990 | 7 h after CABG | 150 mg | 1 | 1495 | 14 | 18 |
| Gavaghan et al, 1991 | <1 h after CABG. | 324 mg | 12 | 690 | 6 | 12 |
| Hockings et al, 1993 | 7 d before CABG | 100 mg | 6 | 273 | 5 | 9 |
| Overall | 3281 | 11 | 18 |
CABG, coronary artery bypass grafting; d, days; h, hours.