The impact of global, regional, and national population ageing on disability-adjusted life years and deaths associated with diabetes during 1990–2019: A global decomposition analysis

To understanding the net regional, national, and economic effect of global population ageing on diabetes and its trends during 1990 and 2019 worldwide. We employed a decomposition method to estimate the impact of population ageing on diabetes-related disability-adjusted life years (DALYs) and total deaths in 204 countries from 1990 to 2019 at the global, regional, and national level. This method separated the net effect of population ageing from population growth and changes in mortality. Globally, population ageing has become the major contributor to diabetes-related deaths since 2013. The increases in diabetes-related deaths attributed to population ageing exceeding the decreases in mortality change. Population ageing produced an additional 0.42 million diabetes-related deaths and 14.95 million DALYs from 1990 to 2019. At the regional level, population ageing is associated with the increases in diabetes-related deaths in 18 out of 22 regions. The highest increase in diabetes-related deaths attributed to population ageing occurred in men in East Asia (136.31%) and women in Central Latin America (118.58%). The proportion of diabetes-related deaths and DALYs attributable to population ageing showed a bell-shaped relationship with sociodemographic index (SDI) and peaked at high-middle-SDI countries. The decreases in diabetes-related deaths attributed to mortality change exceeded the increases attributed to population ageing between 1990 and 2019 globally and regionally. The diabetes-related deaths in high-middle-SDI countries were most impacted by population ageing.