The world faces “an emerging crisis” of higher death rates among teenagers and young adults, according to a major study on the causes of death and disability worldwide.
The reasons vary from drug and alcohol use, and suicide in North America, to infectious diseases and injuries in sub-Saharan Africa, the researchers said, but warned that their data should serve as “a wake-up call”.
The study also found that chronic diseases such as heart disease and diabetes now accounted for two-thirds of all ill health and that mental health problems were surging.
Half of the world’s disease burden was preventable, researchers calculated, driven by risks that could be reduced, such as high blood pressure, air pollution, smoking and obesity.
The Global Burden of Disease study was carried out by a network of 16,500 scientists using more than 300,000 data sources. It is published in the Lancet and was presented at the World Health Summit in Berlin on Sunday.
In North America and parts of Latin America, the rises were driven by suicide and consumption of drugs and alcohol.
“Very marked increases” among teenagers and young adults “certainly got our attention when we were looking at the data”, said Dr Christopher Murray, director of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington’s school of medicine.
Rising deaths in younger adults, particularly in North America, he said, were “very tied up with the rise of anxiety and depression in young people, particularly women”. While the rise of mental health disorders had received much attention, he said, there was still a lot of debate around the causes.
“Is this social media? Is this [electronic] devices? Is this broader social trends on parenting? We know it was made worse by Covid. So there’s a lot of controversy, I’d say, in the psychiatric epidemiology and general social commentary about the causes around mental health. And so that’s a problem for coming up with solutions.”
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Source: The Guardian, 12 October 2025