Objectives To understand the epidemiological characteristics of deaths in residents in Lanzou, Gansu Province, and to provide references for the formulation of disease prevention and control measures.
Methods The authers performed analysis using resident population data and death cause monitoring data, classified diseases according to the International Classification of Diseases 10th Revision (ICD-10) Code, and calculated mortality, standardized mortality rate, potential life reduction years (PYLL), average life reduction years (AYLL) and potential years of life lost rate (PYLLR), etc.
Results The average annual crude mortality rates of male, female residents and total mortality in Lanzhou from 2014 to 2018 were 464.18/100 000, 337.32/100 000 and 402.39/100 000, respectively. The average annual standardized mortality rates of male, female residents and total mortality in Lanzhou from 2014 to 2018 were 473.59/100 000, 345.18/100 000 and 411.00/100 000, respectively. Male mortality rate was higher than that of female (χ2=20.37, P < 0.01). The top 6 causes of death in Lanzhou from 2014 to 2018 were circulation system diseases(170.44/100 000), malignant tumors (90.07/100 000), diseases of respiratory system(53.10/100 000), injuries (24.61/100 000), endocrine, nutritional and metabolic diseases (16.48/100 000) and digestive system diseases (11.37/100 000). The top 6 causes of death accounted for 90.97% (67 435/74 128) of the total cause of death. For the top 6 death causes, PYLL was 391 680 person years, the average AYLL was 5.81 person years, and the rate of PYLLR was 22.97‰ (391 680/17 048 544). Injuries caused the greatest losses of life.
Conclusions Circulation system diseases, malignant tumors, diseases of respiratory system and injuries are the main causes of death for residents in Lanzhou, so it is necessary to strengthen the management of chronic diseases and the intervention of risk factors to reduce the burden of diseases and improve life expectancy of residents.
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