Renal Function-Stratified Comparison of Short- and Long-Term Dual Antiplatelet Therapy in Patients Undergoing Percutaneous Coronary Intervention With Third-Generation Drug-Eluting Stents - Post Hoc Analysis From the HOST-IDEA Randomized Clinical Trial.

Background: The optimal duration of dual antiplatelet therapy (DAPT) in patients with chronic kidney disease undergoing percutaneous coronary intervention (PCI), especially with third-generation drug-eluting stents (DES), remains unknown.

Methods and results: We conducted a prespecified post hoc analysis of the HOST-IDEA trial, randomizing patients undergoing PCI with third-generation DES to 3- to 6-month or 12-month DAPT. In all, 1,997 patients were grouped by their estimated glomerular filtration rate (eGFR): high (>90 mL/min/1.73 m²), intermediate (60-90 mL/min/1.73 m²), and low (<60 mL/min/1.73 m²). The primary outcome was net adverse clinical events (NACE), a composite of cardiac death, target vessel myocardial infarction, clinically driven target lesion revascularization, stent thrombosis, or major bleeding (Bleeding Academic Research Consortium Type 3 or 5) at 12 months. Secondary outcomes were target lesion failure (TLF) and major bleeding. The low eGFR group had the highest rates of NACE, TLF, and major bleeding compared with the other 2 groups (P<0.001). Rates of NACE were similar in the 3- to 6-month and 12-month DAPT in the high (2.9% vs. 3.2%; P=0.84), intermediate (2.1% vs. 2.8%, P=0.51), and low (8.9% vs. 9.1%; hazard ratio 0.99; P=0.97; P_interaction=0.88) eGFR groups. TLF and major bleeding events showed similar trends.

Conclusions: In patients undergoing PCI with third-generation DES, 3- to 6-month DAPT was comparable to 12-month DAPT for clinical outcomes regardless of renal function.