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Changes in cognitive functioning of the oldest old.

B Johansson1, S H Zarit, S Berg

  • 1Institute for Gerontology, Jönköping, Sweden.

Journal of Gerontology
|March 1, 1992
PubMed
Summary
This summary is machine-generated.

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Cognitive function in the oldest old (84-90 years) showed a slight decline over two years, with more individuals experiencing cognitive impairment. Those with better initial cognitive performance maintained stability.

Area of Science:

  • Gerontology
  • Cognitive Neuroscience
  • Epidemiology

Background:

  • Investigating cognitive changes in aging populations is crucial for understanding cognitive health trajectories.
  • The oldest old represent a unique demographic for studying late-life cognitive decline and resilience.

Purpose of the Study:

  • To examine cognitive changes over a 2-year period in individuals aged 84-90.
  • To identify factors associated with cognitive stability or decline in advanced old age.

Main Methods:

  • A longitudinal study design was employed with a representative sample from the Jönköping region, Sweden.
  • Cognitive performance was assessed using a battery of five tests at baseline and after a 2-year interval.
  • Response rate for follow-up interviews was high (94% of survivors).

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Main Results:

  • A small decline in mean cognitive scores was observed across the sample.
  • A 10% increase in the prevalence of significant cognitive impairment was noted.
  • Individuals with better baseline cognitive functioning demonstrated more stable performance over time.

Conclusions:

  • Cognitive function naturally declines in the oldest old, increasing the risk of cognitive impairment.
  • Preserved cognitive function at baseline is a predictor of cognitive stability in advanced age.
  • Further research is needed to explore interventions for maintaining cognitive health in this age group.