The Relationship and Trends of Socio-Demographic Index, Healthy Life Expectancy and Life Expectancy in China
Abstract Background Socio-Demographic Index is an index to evaluate social development. Healthy life expectancy can comprehensively measure the population health. This paper indirectly infers the relationship between SDI and HALE, which provides a reference for improving population health. Methods We used SAS 9.4 to analyze the relationship between SDI and LE, and the development trend of SDI and LE in 1990-2010. Meanwhile, we divided into 3 regions according to the 2019 Chinese Health Statistics Yearbook. Results From 1990 to 2010, SDI and LE showed a trend of gradually increasing from west to East. In the regression analysis of SDI and LE,r=0.90335,P<0.0001, meaning that there was a positive correlation between SDI and LE. The D value of men was lower than that of women. Among the five SDI levels, the high SDI level usually had higher LE, so the D value was relatively high. However, in the middle SDI and low-middle SDI areas, the results showed the opposite situation. The SDI in India is lower than that in China, and the D value of female in China is higher than that in India, which indicates that Chinese elderly women have a long life with disease and disability. Conclusions Socio-Demographic Index has a positive correlation with life expectancy and healthy life expectancy. Therefore, we can consider improving healthy life expectancy from the components of SDI to improve the healthy level of the population. At the same time, we should pay more attention to the care of the elderly population.