Abstract
Background and aimsHyperuricemia is a known risk factor for cardiovascular diseases, but little is known on whether the association between hyperuricemia and poor outcomes in ST-segment elevation myocardial infarction (STEMI) is modified by low-density lipoprotein cholesterol (LDL-c). This study aimed to investigate the effect of the interaction between hyperuricemia and LDL-c on the risk of 1-year post-discharge all-cause mortality in STEMI patients. Methods and resultsA total of 1396 STEMI patients were included. Cox proportional hazards models were used to determine the association between hyperuricemia and 1-year all-cause mortality in the overall population and subgroups stratified based on LDL-c levels (<3.0 mmol/L or ≥3.0 mmol/L). Multivariate analysis indicated that hyperuricemia was associated with 1-year mortality (HR: 2.66; 95% CI: 1.30–5.47; p = 0.008). However, the prognostic effect of hyperuricemia was only observed in patients with LDL-c level ≥3.0 mmol/L (HR: 12.90; 95% CI: 2.98–55.77; p < 0.001), but not in those with LDL-c level <3.0 mmol/L (HR: 0.91, 95% CI: 0.30–2.79, p = 0.875). The interaction between hyperuricemia and LDL-c levels had a significant effect on 1-year mortality. ConclusionHyperuricemia was associated with increased 1-year post-discharge mortality in patients with LDL-c level≥ 3.0 mmol/L, but not in those with LDL-c level< 3.0 mmol/L.
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