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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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The Diagnostic and Statistical Manual of Mental Disorders (DSM) serves as the primary classification system for mental health disorders, providing standardized diagnostic criteria for clinicians and researchers. First published by the American Psychiatric Association (APA) in 1952, the DSM has undergone several revisions to reflect evolving psychiatric understanding. The fifth edition, DSM-5, released in 2013, introduced key updates that expanded diagnostic categories and modified diagnostic...
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Generational Differences in Age-Specific Dementia Prevalence Rates.

Xiaoxue Dou1,2, Sabrina Lenzen1, Luke B Connelly1,3

  • 1Centre for the Business and Economics of Health, The University of Queensland, Brisbane, Queensland, Australia.

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Recent birth cohorts show lower dementia prevalence across the US, Europe, and England. This trend, more pronounced in women, highlights evolving public health needs for dementia care planning.

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Area of Science:

  • Epidemiology
  • Gerontology
  • Public Health

Background:

  • Dementia poses a growing global public health challenge.
  • Increasing life expectancy is projected to raise dementia prevalence worldwide.

Purpose of the Study:

  • To investigate generational variations in age-specific dementia prevalence.
  • To compare dementia rates across the United States, Europe, and England.

Main Methods:

  • Cross-sectional analysis of large-scale aging studies (HRS, SHARE, ELSA) from 1994-2021.
  • Utilized validated algorithms and machine learning to identify probable dementia cases.
  • Employed age-period-cohort methodology to assess generational differences.

Main Results:

  • Individuals from more recent birth cohorts exhibited lower dementia prevalence in all studied regions.
  • This decreasing trend was more significant among women compared to men.
  • Rates varied across regions, with Europe showing the most pronounced decline in recent cohorts.

Conclusions:

  • Findings indicate a generational decline in dementia prevalence.
  • Results are crucial for informing future health and long-term care policies.
  • Understanding these trends is vital for workforce planning in dementia care.