DAILY DYNAMICS OF STENOSING LARYNGOTRACHEITIS INCIDENCE AND RECURRENT STENOSING LARYNGOTRACHEITIS INCIDENCE IN CHILDREN

Background. Stenosing laryngotracheitis (SLT) is one of the most common diseases in children and characterized by cyclic variations. Daily variations of SLT depending on the form of the disease and sex of the patient have not been reported yet. Objective of the research was to study the daily dynamics of SLT incidence in children depending on the sex of the child and form of the disease. Methods. All emergency department calls which resulted in SLT diagnosis (4,455 cases) and recurrent stenosing laryngotracheitis (RSLT) diagnosis (459 cases) in children aged 0-14 years were analyzed. Results. It was found that the percentage of RSLT cases at night and in the morning was significantly higher than the percentage of SLT cases, while in the afternoon and in the evening it was significantly lower. In girls, significant differences between the daily dynamics of SLT and RSLT were not found. In boys, the number of RSLT cases in the morning significantly exceeded the number of cases in the afternoon. Conclusion. SLT usually develops in the evening and at night, while RSLT – at night and in the morning. The daily dynamics of SLT and RSLT incidence demonstrates gender differences.