Objective. To identify and analyze the factors influencing the development of the longterm course of COVID in children and adolescents. Materials and methods. The study was performed in the period 2023–2025 retrospectively by random selection based on medical records of 278 children and adolescents aged 8–17 years who were hospitalized in 2022 at the “Minsk City Children's Infectious Diseases Clinical Hospital” with a diagnosis of coronavirus infection. The influence of various factors on the development of postcovid syndrome in children and adolescents was studied in the context of demographic characteristics (gender and age), duration of hospitalization, concomitant chronic somatic diseases and symptoms present during the acute period of coronavirus infection. Results. The development of postcovid syndrome was found in 18.7 % of children after acute COVID infection, which is slightly lower than the available international data. These results may be related both to the peculiarities of the genotype of the virus that dominated the territory of the Republic of Belarus, and to the peculiarities of the individual immune reactivity of the country's child population. The predominant manifestation of postcovid disorders was asthenic syndrome, which occurred in the framework of postcovid disorders in 100 % of cases. In 86.7 %, it was moderate in severity, and the most common neurological complaint was headaches (100 % of children with postcovoid syndrome). Significant risk factors for developing postcovid syndrome in children and adolescents are hyperthermia in the acute period of the disease (90.4 % of cases, p < 0.05), respiratory diseases (25 % of cases, p < 0.05). The age and gender of the patient, the duration of hospitalization in the acute period, diseases of the circulatory system, congenital malformations and minor abnormalities of the heart, skin and subcutaneous tissue diseases, digestive diseases, diseases of the endocrine system, eating disorders and metabolic disorders have no significant effect on the development of postcovoid syndrome. Diseases of the nervous system (headaches, disorders of the autonomic nervous system) in the anamnesis of children included in the study were very rare and did not have an aggravating effect on the course of the COVID-19 recovery period. Pathology of the acute period: the cough, sore throat, runny nose, difficulty breathing; weakness, dizziness, loss of consciousness; decreased appetite, diarrhea, abdominal pain, vomiting also did not affect the development of postcovoid syndrome in children. Conclusion. The data obtained are important in developing a strategy for monitoring children at risk for the development of long-term postcovoid syndrome in order to minimize possible consequences and the possibility of prescribing early medical rehabilitation.
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