Structural and dynamic features of indicators of morbidity of persons registered for the first time by psychiatric services, or primary incidence, are basic both from positions of understanding of an actual epidemiological situation and from positions of the forecast of this situation for the nearest years, allowing organizational and psychiatric services to react operatively to the observed changes [1,2,4,6,12].
Besides, primary incidence indicators reflect the general state of public health in a certain period more clearly than other indicators, because they are the most "sensitive" to socioeconomic processes, the environmental situation, and the epidemiological situation concerning infectious diseases [1,2,3,5,7]. The socio-economic situation in the country and the prevalence of other diseases, including epidemics, primarily affect the use of patients for psychiatric care [8,9,10,12]. People with mental problems are not always on the radar of psychiatrists. This can be explained both by the subjective position of the individual (lack of understanding of the arisen problem, explanation of mental disorders by overwork, somatic diseases) and by the sufficiency of provision of psychiatric care, its accessibility [9,10,11], the introduction of urgent restrictive measures, as, for example, in the situation with coronavirus infection in 2020.
The establishment of structural and dynamic features of primary incidence in certain age and diagnostic groups enables targeted planning of psychiatric care [7,9,11,12].
Given the above, the study aimed to identify the main structural-dynamic and diagnostic characteristics of the cohort of persons first registered by psychiatric services in the Russian Federation and federal districts in 2018-2020.
The research is based on the analysis of materials of the federal statistical observation, reporting form No. 10 "Information about Diseases of Mental Disorders and Behavioural Disorders (Except Diseases Associated with the Use of Psychoactive Substances)".