Features of chronic non‑infection diseases morbidity adult peoples in preepidemic period and in condition of the spread COVID‑19

   Introduction. The COVID-19 epidemic has had a significant impact on all spheres of life of the population, which affected the incidence of chronic non-communicable diseases.

   The purpose of the study: to study the features of the incidence of chronic non-communicable diseases of the adult population of the metropolis in the pre-epidemic period and in the context of the spread of COVID-19.

   Materials and methods. A retrospective epidemiological analysis of the incidence was carried out according to the data of forms No. 12 and No. 30 on the territory of the municipal polyclinic of St. Petersburg serving the adult population. The epidemiological study includes three periods: a pre-epidemic (2017–2019), an epidemic period (2020–2022) and a decrease in the incidence of COVID-19 (2023–2025). The analysis includes data on diseases with a first-time diagnosis according to disease classes by ICD-10.

   Results and discussion. During the COVID-19 epidemic, there was a statistically insignificant increase in the incidence of chronic non-communicable diseases among the adult population. During the period of a decrease in the intensity of the COVID-19 epidemic process, an increase in the incidence was established compared to the period preceding the epidemic, blood diseases by 8 times, the circulatory system by 5 times, the endocrine system by 4.7 times, the digestive system by 3.9 times, the nervous system by 2.7 times, neoplasms by 2.4 times, the genitourinary system by 2 times, the differences are statistically significant (p < 0.05). Among diseases of the circulatory system, an increase in the number of newly diagnosed diseases associated with an increase in blood pressure was revealed, among respiratory diseases – the incidence of asthma, among diseases of the endocrine system – type 2 diabetes mellitus. An increase in the incidence is observed among the working-age population and especially among people over working age.

   Conclusion. During the spread of COVID-19, there is an increase in the incidence of chronic non-communicable diseases, which may be associated with the improvement of the system of preventive measures and the negative impact of infection caused by SARS-CoV-2.

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