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Evidence for the long-term use of antiplatelet drugs to prevent hepatic vascular complications (HVC) is scarce in liver transplantation (LT).

From national claim data, LT recipients (about 80 % of living donor LT [LDLT]) without graft loss, HVC, or cardiovascular events within 1 year, were classified into those who took antiplatelets for ≥1 year (n = 1744) and for <1 year (n = 1975). Outcomes were compared after the 1-postoperative year index time point.

During a mean follow up of 4.5 years, the risk of graft loss was similar between the groups (aHR 1.16, P = 0.23). However, ≥1-year antiplatelet therapy was associated with a higher risk of graft loss after 3 years (aHR 2.19, P < 0.01). HVC (aHR 0.94, P = 0.87) and major adverse cardiac events (aHR 1.20, P = 0.46) did not correlate with antiplatelet therapy for both groups. In contrast, ≥1-year antiplatelet therapy showed a significantly higher …