Annual dementia cases worldwide projected to more than double by 2050: Study
Researchers found 11.4 million new dementia cases in 2023 and said women and people in low-income countries face higher incidence rates.
- A landmark study published Monday in JAMA Neurology estimates 11.4 million new dementia cases occurred globally in 2023, projected to more than double to 24.7 million by 2050. Researchers from UNSW Sydney's Center for Healthy Brain Aging led the analysis.
- Researchers analyzed data from 22 studies spanning 18 countries, involving 38,418 people through the COSMIC consortium. This international effort addresses historical measurement difficulties across diverse populations.
- Dementia rates are not evenly distributed, with higher incidence among women and in low- and middle-income countries , at 13.6 cases per 1,000 person-years versus 8.3 in high-income countries. Dr. Ashleigh Vella noted understanding these differences is critical for prevention strategies.
- Professor Henry Brodaty, Senior Australian of the Year, warned that "population aging means we cannot simply wait for people to develop dementia and then respond." He noted nearly half of dementia cases could be delayed by addressing 14 risk factors.
- Strengthening healthcare capacity globally is essential, particularly in regions with fewer resources. Monash University researcher Matthew Pase emphasized that solutions must be scalable rather than limited to specialized medical centers in major cities.
22 Articles
22 Articles
New Dementia Cases Projected to More Than Double Globally by 2050
Spectators in wheelchairs attend a concert specifically tailored to people living with dementia at the Wiener Musikverein in Vienna on Dec. 5, 2022. (Alex Halada/AFP via Getty Images)
International research has produced some of the most comprehensive and comparable estimates of new cases of dementia worldwide, revealing that about 11.4 million people developed dementia in 2023 — a number that should rise to 24.7 million per year by 2050. The study, recently published in the journal JAMA Neurology, provides a new global parameter to understand how often new cases of dementia occur in different populations.
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