PMID: Eur J Pediatr. 2021 Aug ;180(8):2699-2705. Epub 2021 Mar 31. PMID: 33788001 Abstract Title: The association between vitamin D levels and the clinical severity and inflammation markers in pediatric COVID-19 patients: single-center experience from a pandemic hospital. Abstract: Vitamin D has an immunomodulating property that regulates the inflammatory response. In this study, the aim was to evaluate the relationship between vitamin D levels and clinical severity and inflammation markers in children and adolescents with COVID-19. The clinical and laboratory records of 103 pediatric cases with COVID-19, whose vitamin D levels had been measured, were retrospectively reviewed. The cases were divided into groups according to their clinical severity (asymptomatic, mild, and moderate-to-severe) and vitamin D levels. The moderate-to-severe clinical group had significantly higher inflammation markers (CRP, procalcitonin, fibrinogen, D-dimer) and a lower lymphocyte count compared to both the mild and asymptomatic groups. The 25 OH vitamin D levels were also significantly lower (p
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