Journal of Clinical Medicine (Mar 2023)

Clinical Course and Severity of COVID-19 in 940 Infants with and without Comorbidities Hospitalized in 2020 and 2021: The Results of the National Multicenter Database SARSTer-PED

  • Małgorzata Pawłowska,
  • Maria Pokorska-Śpiewak,
  • Ewa Talarek,
  • Anna Mania,
  • Barbara Hasiec,
  • Elżbieta Żwirek-Pytka,
  • Magdalena Stankiewicz,
  • Martyna Stani,
  • Paulina Frańczak-Chmura,
  • Leszek Szenborn,
  • Izabela Zaleska,
  • Joanna Chruszcz,
  • Ewa Majda-Stanisławska,
  • Urszula Dryja,
  • Kamila Gąsiorowska,
  • Magdalena Figlerowicz,
  • Katarzyna Mazur-Melewska,
  • Kamil Faltin,
  • Przemysław Ciechanowski,
  • Michał Peregrym,
  • Joanna Łasecka-Zadrożna,
  • Józef Rudnicki,
  • Barbara Szczepańska,
  • Ilona Pałyga-Bysiecka,
  • Ewelina Rogowska,
  • Dagmara Hudobska-Nawrot,
  • Katarzyna Domańska-Granek,
  • Adam Sybilski,
  • Izabela Kucharek,
  • Justyna Franczak,
  • Małgorzata Sobolewska-Pilarczyk,
  • Ernest Kuchar,
  • Michał Wronowski,
  • Maria Paryż,
  • Bolesław Kalicki,
  • Kacper Toczyłowski,
  • Artur Sulik,
  • Sławomira Niedźwiecka,
  • Robert Flisiak,
  • Magdalena Marczyńska

DOI
https://doi.org/10.3390/jcm12072479
Journal volume & issue
Vol. 12, no. 7
p. 2479

Abstract

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This study aimed to analyze the differences in severity and clinical characteristics of COVID-19 in infants hospitalized in Poland in 2021, when the dominance of variants of concern (VOCs) alpha and delta was reported, compared to 2020, when original (wild) SARS-CoV-2 was dominant (III–IV vs. I–II waves of the pandemic, respectively). In addition, the influence of the presence of comorbidities on the clinical course of COVID-19 in infants was studied. This multicenter study, based on the pediatric part of the national SARSTer database (SARSTer-PED), included 940 infants with COVID-19 diagnosed between March 1, 2020, and December 31, 2021, from 13 Polish inpatient centers. An electronic questionnaire, which addressed epidemiological and clinical data, was used. The number of hospitalized infants was significantly higher in 2021 than in 2020 (651 vs. 289, respectively). The analysis showed similar lengths of infant hospitalization in 2020 and 2021, but significantly more children were hospitalized for more than 7 days in 2020 (p p < 0.0001). Severe and critical conditions were significantly more common among children with comorbidities. More infants were hospitalized during the period of VOCs dominance, especially the delta variant, compared to the period of wild strain dominance, even though indications for hospitalization did not include asymptomatic patients during that period. The course of COVID-19 was mostly mild, characterized mainly by fever and respiratory symptoms. Comorbidities, particularly from the cardiovascular system and prematurity, were associated with a more severe course of the disease in infants.

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