Dynamics of the incidence of congenital malformations in children in Chelyabinsk based on the results of epidemiological monitoring in 2012–2017

Abstract

Congenital malformations are not only a medical, but also a serious social problem, since this pathology is a leading cause of perinatal, neonatal, and infant morbidity, disability, and mortality.Purpose. To analyze the variation dynamics in the incidence of groups of congenital malformations, the structure of congenital malformations according to the average incidence, and the consistency of changes in the incidence of individual groups of congenital anomalies in children of Chelyabinsk based on the results of epidemiological monitoring in 2012–2017.Material and methods. To assess the frequencies of congenital malformations, we used the monitoring data of the Regional Medicaland Genetic Consultation Office in Chelyabinsk for the period from 2012 to 2017, for Down syndrome (T21) from 2012 to 2018. The total number of newborns over the six-year period was 102,308, of which 2101 children were registered with congenital malformations, including live-born, stillborn children, and fetuses with malformations identified through prenatal diagnostics. Clinical data on newborns was grouped into 11 congenital malformations categories based on the International Classification of Diseases. The statistical analysis of the monitoring results was carried out using methods of descriptive statistics, samples comparisons, correlation, and cluster analysis.Results. The incidence of all registered congenital malformations in newborns in Chelyabinsk was 20.7 per 1000 births (95% CI: 17.4–25.4) during the study period. In newborns of the Chelyabinsk city in 2012–2017, the prevalence of congenital malformations of the circulatory system (42.8%), chromosomal abnormalities (11.9%), and anomalies of the musculoskeletal system (10.3%) was observed. The relative frequency of Down syndrome for the period from 2012 to 2018 ranged from 1.51‰ to 2.42‰, considering both children born with this pathology and the data on prenatal diagnostics.Conclusion. The hierarchy of congenital malformations was reproduced from year to year with a predominance of circulatory anomalies, chromosomal anomalies, and musculoskeletal anomalies of the system. The overall incidence of all congenital malformations in Chelyabinsk in 2012–2017 does not exceed the average values for the Russian Federation, while the incidence of Down syndrome exceeded the average national level.