RT Journal Article SR Electronic T1 Prevalence of thrombotic complications in children with SARS-CoV-2 JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP archdischild-2020-321351 DO 10.1136/archdischild-2020-321351 A1 David Aguilera-Alonso A1 Sara Murias A1 Amelia Martínez-de-Azagra Garde A1 Antoni Soriano-Arandes, A1 Marta Pareja A1 Enrique Otheo A1 Cinta Moraleda A1 Alfredo Tagarro A1 Cristina Calvo A1 , YR 2021 UL http://adc.bmj.com/content/early/2021/05/24/archdischild-2020-321351.abstract AB Knowledge of thrombosis in children with SARS-CoV-2 is scarce. In this multicentre national cohort of children with SARS-CoV-2 involving 49 hospitals, 4 patients out of 537 infected children developed a thrombotic complication (prevalence of 0.7% (95% CI: 0.2% to 1.9%) out of the global cohort and 1.1% (95% CI: 0.3% to 2.8%) out of the hospitalised patients). We describe their characteristics and review other published paediatric cases. Three out of the four patients were adolescent girls, and only two cases had significant thrombotic risk factors. In this paediatric cohort, D-dimer value was not specific enough to predict thrombotic complications. Adolescence and previous thrombotic risk factors may be considered when initiating anticoagulant prophylaxis on children with SARS-CoV-2 disease (COVID-19).All data relevant to the study are included in the article or uploaded as supplemental information.