Lipoprotein(a) in youth and childhood as a marker of cardiovascular risk stratification: a meta-analysis

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BACKGROUND AND AIMS: Lipoprotein(a) [Lp(a)] is recognized as a risk factor for atherosclerotic cardiovascular diseases (ASCVD), yet its impact during childhood and youth remains understudied. This study aims to evaluate the role of Lp(a) as an independent risk factor for premature ASCVD among young patients. METHODS: PubMed, Scopus, and CINAHL Complete databases were systematically searched from inception to 12 December 2023 for adjusted observational studies examining the impact of Lp(a) in young patients. Premature coronary artery disease (CAD) and premature arterial stroke were designed as primary endpoints, while the association with family history of premature CAD and familial hypercholesterolemia were secondary endpoints. RESULTS: Fourteen studies, encompassing 9923 patients, were included in the analysis. Nine studies assessed Lp(a) as an independent risk factor for premature CAD. Meta-analysis revealed Lp(a) to be significantly associated with premature CAD [odds ratio (OR) 1.07, 95% confidence interval (CI) 1.01-1.13, P = 0.02]. Four studies revealed that the high levels of Lp(a) were associated with a more than two-fold increased risk of arterial stroke (OR 2.51; 95% CI 1.51-4.16, P = 0.004). However, insufficient studies were retrieved to perform a metanalysis for the secondary endpoints. CONCLUSION: Findings from adjusted observational studies suggest that Lp(a) serves as a risk factor for premature CAD and for arterial stroke in the youngest population.

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