• Nurhan Kasap, Onur Incealtin, Velat Celik, and Mehmet Agirbasli.
• Department of Paediatric Allergy-Immunology, Istanbul Medeniyet University, Istanbul, Turkiye.
• J Coll Physicians Surg Pak. 2024 Apr 1; 34 (4): 451455451-455.

ObjectiveTo investigate high-density lipoprotein cholesterol (HDL-C) levels in children with COVID-19.Study DesignDescriptive study. Place and Duration of the Study: Goztepe Professor Suleyman Yalcin City Hospital, Istanbul, Turkiye, between 2020 and 2022.MethodologyThe hospital data were examined to find children (<18 years) who presented with COVID-19. The associations between HDL-C, inflammatory biomarkers, hospital admission requirements, and prolonged hospital stays in children with COVID-19 were analysed.ResultsDuring the study period, 1,056 children were diagnosed with COVID-19. Lipid levels were measured in 193 patients during outpatient clinic visits from the same hospital records. One hundred and twenty-seven (65.5%) patients displayed low HDL-C levels. One hundred and nine (86.5%) of the patients with low HDL-C and 33 (50.0%) of the patients with normal HDL-C were hospitalised (p=0.012). Patients with lower HDL-C exhibited higher triglyceride (median 124 vs. 81 mg/dl, p<0.001), glucose (median 116 vs. 101 mg/dl, p=0.001), lactate dehydrogenase (LDH) (median 343 vs. 251 mg/dl, p<0.001), C-reactive protein (CRP) (median 0.6 vs. 0.5 mg/L, p=0.009), D-dimer (median 1.3 vs. 0.3 mcg/mL, p<0.001), ferritin (median 127 vs. 40 µg/L, p<0.001), and uric acid (median 5.5 vs. 4.5 mg/dL, p=0.002) levels compared to children with normal HDL-C. Logistic regression (LR) analysis showed that age (OR = 0.87, CI for OR 0.80-0.94, p < 0.001), ferritin (OR = 1.004, CI for OR 1.001-1.006, p = 0.003), and D-dimer (OR = 2.171, CI for OR 1.183-3.984, p = 0.012) were associated with lower HDL-C level in children with COVID-19.ConclusionLow HDL-C levels were common in children with COVID-19. Children with COVID-19 and low HDL-C were more frequently hospitalised and had higher inflammatory biomarkers of COVID-19 than children with COVID-19 and normal HDL-C levels.Key WordsHDL-C, HDL-C levels in children, COVID-19, Children with COVID-19.

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