A new study into midlife mortality across high-income countries has found that the number of middle-aged adults dying in the US is concerning. The research, published in the Journal of Epidemiology, revealed that most countries have seen a significant decline in midlife mortality – but not America. Midlife death rate highest in the USResearchers from the Leverhulme Centre for Demographic Science (LCDS) and Princeton University found that US working-age adults are dying at higher rates than their peers in other high-income countries. They used annual mortality data from the World Health Organiz…