Amsterdam UMC case-control study finds Lp(a) above 50 mg/dL is nearly seven times more common in children with ischaemic stroke (Pediatr Blood Cancer 2024)

Background: Pediatric arterial ischemic stroke (AIS) is a rare disorder, associated with severe morbidity. In adults, elevated lipoprotein(a) (Lp(a)), a cholesterol-like particle, is associated with ischemic stroke. However, data on Lp(a) and pediatric AIS are scarce. Therefore, we evaluated the association between Lp(a) levels and pediatric AIS.

Methods: We included children who suffered an AIS (≤18 years) and were treated in a tertiary center in Amsterdam, the Netherlands. Two groups of children with AIS were identified: (i) neonates and (ii) children older than 29 days. A case-control study was performed, with the latter group as cases and children without AIS as control group. Cases and controls were matched for age of Lp(a) testing and sex. Multivariable logistic regression models were used.

Results: Thirteen neonates and 23 children were included. Mean (SD) age of AIS was 0.6 (2.0) days and 9.2 (6.3) years, respectively. Children with AIS were matched to 62 controls. Lp(a) levels of greater than 50 mg/dL were more prevalent in children with AIS compared to controls (21.7% vs. 3.2%, p = .02). A significant association was found between Lp(a) and AIS (odds ratio [OR] adjusted for age at Lp(a) testing, body mass index [BMI], measurement assay: 1.36 per 10 mg/dL increase of Lp(a), 95% confidence interval [CI]: 1.02-1.82, p = .041).

Conclusions: In this study, Lp(a) levels were positively associated with the risk of AIS in children, suggesting that high Lp(a) might be an independent risk factor for AIS. This underlines the importance of Lp(a) measurement in children with AIS.