LAUSR

Objective: To analyze the impact of malignant neoplasms, cardiovascular diseases, respiratory diseases and diabetes (four major chronic diseases) on the increase of life expectancy of local population in Ji'nan during 2015-2020. Methods: Based on 2015-2020 cause-of-death surveillance information and population data of Ji'nan, we used abbreviated life expectancy table and Arriaga decomposition method to analyze the overall and disease specific contributions of four major chronic diseases to the increase of life expectancy, and the gender and age specific contributions of mortality rates of four major chronic diseases to the increase of life expectancy of local population from 2015 to 2020. Results: Life expectancy of the local population in Ji'nan increased by 1.59 years from 2015 to 2020. The decline in mortality rates of the four major chronic diseases contributed 1.25 years, with a contribution of 78.62%. The life expectancy in men increased by 1.66 years, with a contribution of 1.18 years from the decline in mortality rate of four major chronic diseases, and the life expectancy in women increased by 1.52 years, with a contribution of 1.35 years from the decline in mortality of four major chronic diseases. The declines in the mortality rates of malignant neoplasms, cardiovascular diseases, respiratory diseases and diabetes contributed 0.42, 0.62, 0.20, and 0.01 years to life expectancy, respectively. The decline mortality rate of gastric cancer contributed more to the increase of life expectancy compared with lung cancer. The increase in the mortality rate of hypertensive heart disease resulted in a negative contribution. Asthma and diabetes contributed very little to the increase of life expectancy. Conclusions: The increase in the life expectancy of local population in Ji'nan from 2015 to 2020 was mainly attributed to the decline in mortality of four major chronic diseases. It is necessary to pay close attention to the diseases which contributed very little or even had negative contribution to the increase of life expectancy, such as lung cancer, diabetes and hypertensive heart disease.