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54.4% of the women had a free T4 below the threshold of hypothyroxinemia. We find a significant effect of maternal hypothyroxinemia on the general cognitive index, and on perceptual-manipulative and memory coefficients.

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Background Coronavirus disease 2019 in children, or pediatric COVID-19, initially was described as an acute respiratory syndrome similar to the adult presentation but with less severe manifestations. Methods We describe the clinical characteristics, disease presentation, treatments and outcomes of all pediatric cases with COVID-19 admitted to the reference hospitals in Navarra, Spain during the first wave of the COVID-19 outbreak (February-May 2020). Results We found a low number of hospitalized cases in infants and children compared to adults with a hospitalization ratio of 1:180. Most of these hospitalized cases did not suffer from severe disease. Over 80% of infections reported household contacts, and the mother was the known-contact in 83% of these cases. 72% of hospitalized cases were previously healthy children. We describe how symptoms in pediatric cases are nonspecific and how COVID-19 can be presented with a wide range and variety of symptoms. Respiratory symptoms are not always present, and severe neurological and cardiac features can occur in previously healthy children. Conclusion Epidemiological description and case reports will be key to a better recognition and to adequate treatment of pediatric patients with COVID-19.