Wednesday, July 26, 2017
Good news for all of us! The July 2017 issue of Today's Research on Aging from the Population Reference Bureau reports a proportional decline in dementia. Dementia Trends: Implications for an Aging America explains that
While the absolute number of older Americans with dementia is increasing, the proportion of the population with dementia may have fallen over the past 25 years, according to a recent U.S. study (Langa et al. 2017). Researchers say this downward trend may be the result of better brain health—possibly related to higher levels of education and more aggressive treatment of cardiovascular risk factors such as high blood pressure and diabetes.
After discussing the research, the research report also notes this
The decline in dementia prevalence coupled with longer life expectancy may be contributing to another change: A growing share of older Americans are spending less of their lifetimes with cognitive impairments, another recent study based on HRS data and vital statistics shows (Crimmins, Saito, and Kim 2016). The gains in life expectancy between 2000 and 2010 represent more time older Americans spend cognitively intact, the researchers report. The share of Americans 65 and older without cognitive problems increased by 4.5 percentage points for men and 3.4 percentage points for women during the decade. At the same time, the average time older people spent with dementia or cognitive impairment shortened slightly.
The report discusses the various theories and work done to help with "brain training", the correlations (if any) between certain diseases and dementia, and policy and budgetary implications. The report concludes:
Improvements in understanding, diagnosing, preventing, and treating Alzheimer’s disease and other dementias are top NIA priorities. The 2011 National Alzheimer’s Project Act and related legislation lay the foundation and provide new funding for “an aggressive and coordinated national plan to accelerate research.” This initiative includes research designed to better answer the following questions:
•What roles do education and intellectual stimulation play in delaying or preventing dementia?
•What are the connections among dementia, cardiovascular disease, obesity, and diabetes?
•What are the best ways to reduce the dementia risks that minority group members face?
Refining our understanding of the answers to these questions can enable policymakers and
planners to design and test prevention strategies that can contribute to continued future decline
in dementia prevalence.