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Population ageing and mortality during 1990–2017: A global decomposition analysis


Autoři: Xunjie Cheng aff001;  Yang Yang aff002;  David C. Schwebel aff004;  Zuyun Liu aff005;  Li Li aff006;  Peixia Cheng aff001;  Peishan Ning aff001;  Guoqing Hu aff001
Působiště autorů: Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, China aff001;  Department of Biostatistics, College of Public Health and Health Professions, University of Florida, Gainesville, Florida, United States of America aff002;  Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America aff003;  Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America aff004;  Department of Pathology, Yale School of Medicine, New Haven, Connecticut, United States of America aff005;  Division of Epidemiology, College of Public Health, Ohio State University, Columbus, Ohio, United States of America aff006;  National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China aff007
Vyšlo v časopise: Population ageing and mortality during 1990–2017: A global decomposition analysis. PLoS Med 17(6): e32767. doi:10.1371/journal.pmed.1003138
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pmed.1003138

Souhrn

Background

As the number of older people globally increases, health systems need to be reformed to meet the growing need for medical resources. A few previous studies reported varying health impacts of population ageing, but they focused only on limited countries and diseases. We comprehensively quantify the impact of population ageing on mortality for 195 countries/territories and 169 causes of death.

Methods and findings

Using data from the Global Burden of Disease Study 2017 (GBD 2017), this study derived the total number of deaths and population size for each year from 1990 to 2017. A decomposition method was used to attribute changes in total deaths to population growth, population ageing, and mortality change between 1990 and each subsequent year from 1991 through 2017, for 195 countries/territories and for countries grouped by World Bank economic development level. For countries with increases in deaths related to population ageing, we calculated the ratio of deaths attributed to mortality change to those attributed to population ageing. The proportion of people aged 65 years and older increased globally from 6.1% to 8.8%, and the number of global deaths increased by 9 million, between 1990 and 2017. Compared to 1990, 12 million additional global deaths in 2017 were associated with population ageing, corresponding to 27.9% of total global deaths. Population ageing was associated with increases in deaths in high-, upper-middle-, and lower-middle-income countries but not in low-income countries. The proportions of deaths attributed to population ageing in 195 countries/territories ranged from −43.9% to 117.4% for males and −30.1% to 153.5% for females. The 2 largest contributions of population ageing to disease-specific deaths globally between 1990 and 2017 were for ischemic heart disease (3.2 million) and stroke (2.2 million). Population ageing was related to increases in deaths in 152 countries for males and 159 countries for females, and decreases in deaths in 43 countries for males and 36 countries for females, between 1990 and 2017. The decreases in deaths attributed to mortality change from 1990 to 2017 were more than the increases in deaths related to population ageing for the whole world, as well as in 55.3% (84/152) of countries for males and 47.8% (76/159) of countries for females where population ageing was associated with increased death burden. As the GBD 2017 does not provide variances in the estimated death numbers, we were not able to quantify uncertainty in our attribution estimates.

Conclusions

In this study, we found that population ageing was associated with substantial changes in numbers of deaths between 1990 and 2017, but the attributed proportion of deaths varied widely across country income levels, countries, and causes of death. Specific preventive and therapeutic techniques should be implemented in different countries and territories to address the growing health needs related to population ageing, especially targeting the diseases associated with the largest increase in number of deaths in the elderly.

Klíčová slova:

Age groups – Aging – Aging and cancer – Alzheimer's disease – Coronary heart disease – Death rates – Global health – Population growth


Zdroje

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