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th of the first child and subsequent children. The decreasing of studied indicator is based on negative dynamics of first births, but if the process is managed it is likely to stabilize indicator that results in its subsequent increasing.The purpose of study was to establish risk group on hepatitis C in conditionally healthy population of the Belgorod oblast. Total 2025 conditionally healthy inhabitants aged between 1 and 99 were surveyed and serum samples from them were tested. There were eight age groups 1-14 years (12.3%), 15-19 years (13.1%), 20-29 years (12.7%), 30-39 years (12.8%), 40-49 years (12.8%), 50-59 years (11.8%), 60-69 years (8.6%) and over 70 years of age (15.7%). Overall, 44.6% of the examined persons were male. 41.3% (ranging from 6.5 to 72.1%) of respondents reported surgery in their anamnesis, 5.1% (ranging from 0.8 to 12.6%) had blood/blood products transfusion, 10.3% (ranging from 1.7 to 57.9%) ear/nose piercing and 2.96% (ranging from 0.8 to 6.6%) tattoos. There were no people who injected drugs. The piercing was significantly higher in age groups 15-19 years and 20-29 years than other age groups (p-value less then 0.05). The tattoos were significantly higher in group of 70 years and older than in age groups 15-19 year group 20-29 years. The study established that risk age group are inhabitants born before 1965 in Belgorod region. It can be taken into account in regional hepatitis С screening programs.The encoding of cases of disease and death is the translation of clinical diagnoses into alphanumeric code with observance of certain rules. Properly selected ICD-10 codes ensure reliability of statistical data that undoubtedly affects quality of managerial decisions. The article considers results of analysis of information from primary medical documentation (in-patient medical record, discharged patient statistical record) and its comparing with the ICD-10 codes. The detailed analysis of encoding errors is presented. The structure of hospital morbidity and mortality of patients of palliative care department of multidisciplinary hospital is analyzed.Despite attempts of improving actual system of morbidity and mortality accounting, the study research established significant real data distortion. These differences do not allow to assess in fullness complete picture of actual morbidity and mortality. Hence, improvement of approaches to increasing efficiency of indices data registration. The study was carried out in 2017-2019 on the bases of medical organizations of the Ministry of Internal Affairs of Russia. The study assessed quality of encoding of morbidity of 28 061 case histories/out-patient records. The size needed to obtain reliable results was determined using the Lopez-Jimenez formula. The statistical data was processed by MS Excel and Statistica-6 software. The most common errors were associated with non-rubricated and incorrectly rubricated diagnoses (53.2%, n = 2860). The second most common error in the structure of incorrectly formulated diagnosis was associated with using non-informative terms (14.6%, n = 785). The errors regarding non-observance of the ICD 10 revision requirements followed resulting in using and wordings not corresponding to modern classification (10.6%, n = 568). A number of errors was associated with unspecified localization of process (3.6%, n = 195) and other rarely occurring causes (2.6%, n = 139). The results of study permitted to conclude that one of the most promising directions of modernization of the encoding system is the automated encoding system.The positive trend of decreasing mortality of elderly population in all countries of the European Region in 2000-2015 was observed. In the Russian Federation the mortality of elderly population decreased up to 3,798.3 per 100 000 population in the 2018, i.e. on 14% lower as compared with 2012 (4424.6), and on 45% lower as compared with corresponding indices in 1998 (6877.0 per 100 000 population). The purpose of the study is to identify characteristics of mortality and to compare with foreign data of mortality of population older than able-bodied age in the Russian Federation. The standardized indices of mortality in 2012-2018 were analyzed. The gender characteristics of mortality levels were established. The main causes and the structure of main causes of death were presented. click here The comparison of mortality rates. The contribution of particular age groups into total mortality of population of the Russian Federation over the years was described.The purpose of the study is to analyze dynamic of primary and general morbidity of population older than able-bodied age in Moscow Oblast, including data comparing in the Central Federal Okrug and the Russian Federation. The data of statistical reports of City of Moscow, the Central Federal Okrug and the Russian Federation in 2013-2018 was included in analysis. The common analytical and mathematical statistical methods were applied. It was established that in Moscow Oblast in 2013-2018, against the background of stagnation of primary morbidity of population older than able-bodied age, indices of mental and behavioral disorders, neoplasms and diseases of circulatory system. At the same time, the level of primary morbidity of the region’s population older than able-bodied age exceeds that one of the Russian Federation or the Central Federal Okrug in almost all classes of diseases. The structure of primary morbidity has not changed and respiratory diseases, injures and poisoning and diseases of circulatory system continue to rank first places. The level of general morbidity also remained unchanged. However, morbidity of neoplasms, diseases of endocrine system and mental and behavior disorders continues to increase. The structure of general morbidity of population of this age group differs the structure of primary morbidity and diseases of circulatory, respiratory and musculoskeletal systems ranked first places. Monitoring and analysis of primary and general morbidity of population older than able-bodied age is necessary for developing measures of its decreasing on the basis of development of medical social and geriatric care in the regions.