Can the Systemic Inflammatory Index, Neutrophil-Lymphocyte Ratio and Platelet-Lymphocyte Ratio Detect Pediatric Covid-19 Variants?

Background: Covid-19 has undergone many mutations over time. The most prominent variants have been the Alpha, Beta, Delta, Gamma, and finally, the Omicron variants. This study aims to determine the availability of neutrophil/lymphocyte rate (NLR), platelet/lymphocyte rate (PLR) and Systemic Inflammatory Index (SII), prog-nostic and diagnostic significance, in the differentiation of variants in pediatric Covid-19 patients. Materials and Methods: In this retrospective study, 141 pediatric patients who were found to be positive for Covid-19 in Harran University Medical Faculty Hospital between January 2021 and April 2022 were included. A control group was formed from 107 healthy children selected from among those who applied to the general pediatric outpatient clinic for routine health evaluations. Results: When the age distribution of the patients was examined, the median was 7.0 (0.1-18) years. When the variants were compared, there was a significant difference between lymphocyte values, while leukocyte, neu-trophil, C-reactive protein (CRP) and Mean Platelet Volume (MPV) did not change significantly. At the same time, there was a statistically significant difference between NLR, PLR and SII variants in Covid-19 positive patients (p0.05). It was observed that the NLR, PLR and SII delta variants increased significantly compared to the omicron variant (p