Less Dementia in America | aponet.de

The age-adjusted prevalence of dementia in the over-65s fell by almost a third, from 12.2 percent in 2000 to 8.5 percent in 2016. This trend has been evident throughout, but between 2000 and 2004 the ratio fell particularly sharply, reports the research team in the journal Proceedings of the National Academy of Sciences. Dementia was more common in women than men throughout the period, but the gap narrowed between 2000 and 2016: prevalence fell by 3.2 percentage points from 10.2 to 7.0 percent in men and from 13.6 percent in women to 9 .7 percent.

There is increasing evidence that the age-adjusted prevalence of dementia is declining in industrialized countries. Possible reasons are increasing levels of education, less smoking and better treatment of important risk factors such as high blood pressure. Thus, it was observed in the study that education was an important factor that helped reduce dementia. The share of university-educated men increased from 21.5 percent in 2000 to 33.7 percent in 2016, and the share of women from 12.3 to 23 percent.

Because age is the strongest risk factor for dementia, experts estimate that increasing life expectancy could triple the prevalence of Alzheimer’s disease and other dementias worldwide from around 50 million to 150 million by 2050. “The reasons for the decline in dementia prevalence are not exactly known, but this decline may help ease the expected burden on families, nursing homes and other support systems,” said P├ęter Hudomiet of the Santa Monica-based RAND Corporation.

What: DOI: 10.1073/pnas.2212205119

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