It aimed to determine the clinical value of serum KL-6, SP-D and sRAGE levels as a prognostic marker in children with COVID-19 patients.. This study was planned as a case-control study with patients hospitalized in the Haseki Training and Research Hospital Pediatric Infection Ward. A total of 150 children, including at least 30 patients in each group were included in the study. The study group was divided into three groups according to COVID-19 WHO clinical progression Scale: uninfected (Group 1), mild (Group 2) and moderate (group 3). In order to investigate the relationship between disease severity and alveolar damage, serum KL-6, SP-D and sRAGE levels and high sensitive C-reactive protein were measured. These biomarkers levels were compared between three groups.
