October 23, 2026

@michaelokun

Are we heading toward 25 million new dementia cases every year by 2050? A global warning we cannot ignore. Incidence refers to the number of new cases of a disease occurring over a specific period of time. Ashleigh Vella and colleagues describe in a new paper in JAMA Neurology a global analysis of dementia incidence and what the future may hold. The researchers examined 38,418 adults from 22 studies across 18 countries or territories on 6 continents. Key points: - Researchers estimated 11.4 million new dementia cases worldwide in 2023, projected to increase to 24.7 million annually by 2050 if age-specific rates remain unchanged. - Women had higher age-adjusted dementia incidence than men, approximately 10.6 versus 8.6 cases per 1,000 person-years. - Low- and middle-income countries experienced substantially higher dementia incidence than high-income countries, 13.6 versus 8.3 cases per 1,000 person-years, highlighting an important global health disparity. My take: This study should be a wake-up call. We are heading toward a future where nearly 25 million folks could develop dementia every year. That is more than 67,000 new cases every single day. What resonates w/ me is that this is not simply a story about aging. It is a story about prevention, inequity and whether our health care systems will be prepared. We cannot afford to wait until folks develop memory loss before acting. We need to invest in prevention, address modifiable risks and build systems capable of diagnosing and caring for millions more families. Here are 3 points that resonated w/ me: 1- The projected increase from 11.4 million to 24.7 million new cases annually represents more than a doubling of the global dementia burden, largely driven by population aging. 2- Women deserve special attention in dementia research and prevention because their incidence rates were higher even after accounting for age. 3- The substantially higher incidence in lower-income countries reminds us that where folks live and the resources available to them may shape their brain health and access to care.