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The Impact of COVID-19 Pandemic during 2020–2021 on the Vitamin D Serum Levels in the Paediatric Population in Warsaw, Poland

1
Pediatric, Nephrology and Allergology Clinic, Military Institute of Medicine, 04-141 Warsaw, Poland
2
Cell Cycle Group, Faculty of Medicine, Institute of Genetics and Development of Rennes, University of Rennes 1, 35000 Rennes, France
*
Author to whom correspondence should be addressed.
Academic Editor: William B. Grant
Nutrients 2021, 13(6), 1990; https://doi.org/10.3390/nu13061990
Received: 7 May 2021 / Revised: 28 May 2021 / Accepted: 2 June 2021 / Published: 9 June 2021
(This article belongs to the Section Micronutrients and Human Health)
Background: The main source of vitamin D is skin synthesis, which depends on sunlight exposure. During the pandemic, COVID-19 children were obliged to home confinement, which potentially limiting sunlight exposure. The aim of this study was to evaluate whether home confinement led to decreased vitamin D serum levels in children in Warsaw, Poland. Methods: The study included 1472 children who were divided into two groups, based on the date of 25(OH)D level blood sampling: before and during the pandemic. Children under 1 year of age (infants) were analysed separately. Results: A statistically significant decrease in the average level of vitamin D was observed between groups of children over 1 year of age (35 ng/mL ± 18 vs. 31 ng/mL ± 14). In infants from both groups, the mean vitamin D levels were within the normal range (Group 1 inf 54 ng/mL ± 21 vs. Group 2 inf 47 ng/mL ± 15). The characteristic seasonal variability was observed before the pandemic, with maximal vitamin D levels in summer (40 ng/mL ± 17) and minimal levels in winter (30 ng/mL ± 14). During the pandemic, no seasonal variability was observed (summer 30 ng/mL ± 11 vs. winter 30 ng/mL ± 19). Conclusions: The COVID-19 pandemic restrictions led to a significant decrease in vitamin D serum levels in children. View Full-Text
Keywords: vitamin D; COVID-19; children vitamin D; COVID-19; children
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MDPI and ACS Style

Rustecka, A.; Maret, J.; Drab, A.; Leszczyńska, M.; Tomaszewska, A.; Lipińska-Opałka, A.; Będzichowska, A.; Kalicki, B.; Kubiak, J.Z. The Impact of COVID-19 Pandemic during 2020–2021 on the Vitamin D Serum Levels in the Paediatric Population in Warsaw, Poland. Nutrients 2021, 13, 1990. https://doi.org/10.3390/nu13061990

AMA Style

Rustecka A, Maret J, Drab A, Leszczyńska M, Tomaszewska A, Lipińska-Opałka A, Będzichowska A, Kalicki B, Kubiak JZ. The Impact of COVID-19 Pandemic during 2020–2021 on the Vitamin D Serum Levels in the Paediatric Population in Warsaw, Poland. Nutrients. 2021; 13(6):1990. https://doi.org/10.3390/nu13061990

Chicago/Turabian Style

Rustecka, Agnieszka, Justyna Maret, Ada Drab, Michalina Leszczyńska, Agata Tomaszewska, Agnieszka Lipińska-Opałka, Agata Będzichowska, Bolesław Kalicki, and Jacek Z. Kubiak. 2021. "The Impact of COVID-19 Pandemic during 2020–2021 on the Vitamin D Serum Levels in the Paediatric Population in Warsaw, Poland" Nutrients 13, no. 6: 1990. https://doi.org/10.3390/nu13061990

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