Mental health problems of the people have an important, not only clinical but also social importance, largely reflecting the overall well-being of the population in the country as a whole and the micro-society in particular [1,2,10,11]. Mental disorders, being one of the most common forms of diseases, can exist separately and be manifestations of somatic diseases [1,2,3], so in recent decades in European countries and the Russian Federation, special attention has been paid to mental disorders. This is evidenced by numerous publications in recent decades and documents of WHO [10,11].
The relevance of a thorough study of the epidemiological situation regarding mental health is also determined by the results of socio-economic reforms of psychiatric services in Russia since 2005, which have certainly had and continue to have an impact on mental health in the country [3, 4, 6, 7, 9].
In the new century, socio-economic, demographic factors, and environmental conditions are changing rapidly; society has to face epidemics of new, unexplored diseases. Against this background, the mental state of the population becomes unstable; one has to deal with a sharp increase or sharp decrease in morbidity rates associated with changes in such factors as the availability of psychiatric care, the appeal to psychiatrists, the actualization of infectious diseases, with the revision of priorities in the provision of medical care [5, 6, 8, 9].
The expansion of hospital-replacing technologies requires specialists of the outpatient psychiatric service to be more active not only in the early diagnosis of mental disorders but also in differentiated approaches to the provision of psychiatric care to primary patients.
By the above, regular monitoring of the prevalence of psychopathology in different clinical and age groups becomes especially important. It allows identifying areas in Psychiatry that require particularly close attention, to predict changes in the epidemiological situation, and, following the results, to develop, plan, and implement measures for psychiatric care for the population [1,3,6,7,8].