Background:Both serum uric acid (SUA) levels and TyG index have been reported to associate with adverse outcomes in patients with coronary artery disease. Limited evidence has focus on the combined and mediating effects of TyG on the association between SUA and cardiovascular and cerebrovascular events in patients underwent percutaneous coronary intervention (PCI).
Methods:In this retrospective cohort study, a total of 6923 patients who underwent PCI were included. The patients were grouped based on the cut-off value of the TyG index and the sex-specifc criteria of hyperuricemia (HUA).
The primary end point was major adverse cardiovascular and cerebrovascular events (MACCE), a composite of cardiac death, myocardial infarction, stroke, and target lesion revascularization.
Cox regression analysis was conducted to estimate the association of TyG index and SUA with clinical outcome. A mediation analysis was performed to assess whether TyG index mediates the relationship between SUA and MACCE.
Results:During a median of 693 days follow-up, 756 (10.9%) patients experienced MACCE. Compared with the Non-HUA/L-TyG group, the HUA/H-TyG group experienced the highest MACCE risk[hazard ratio(HR): 1.455,95% confidence interval(CI): 1.177–1.799, p < 0.001], followed by the HUA/L-TyG group(HR: 1.342, 95% CI: 1.093–1.647, p = 0.005) and Non-HUA/H-TyG (HR: 1.226, 95% CI: 1.007–1.493, p = 0.043). The TyG index significantly mediated 50.25% of the relationship between SUA and MACCE (p < 0.001).
Conclusions:In patients undergone PCI, the TyG index and HUA synergically increased the risk of cardiovascular and cerebrovascular events, and TyG index partially mediated the association between HUA and clinical outcomes, which emphasizes that combining TyG and SUA can help identify high risk patients.