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Memory and cognitive trajectories from age 85 to 100: Normative and individual data in H70.

Paper i proceeding
Författare Valgeir Thorvaldsson
S Berg
G Steen
Boo Johansson
Publicerad i 17th Nordic Congress of Gerontology, Stockholm, Sweden (abstract nr. P155:18)
Publiceringsår 2004
Publicerad vid Psykologiska institutionen
Språk en
Ämneskategorier Psykologi

Sammanfattning

There are few population-based studies on intra-individual change and stability in cognitive functioning in very late life. Using a normative approach to analyse longitudinal data presents problems due to decreasing sample sizes, substantial intra-individual variability and inter-individual differences. Aim: To examine memory and cognitive trajectories at the individual and sample levels, from age 85 to 100. Methods: Test of verbal meaning, reasoning, spatial ability, perceptual speed, and episodic memory were administered across eight occasions (at ages 85, 88, 90, 92, 95, 97, 99, and 100) in the H70 population-based study. Results: The overall declines in cohort mean trajectories differ from individual trajectories that show decline as well as improvement and stability. Performances were significantly higher among those who survived over a longer time period. Few showed better performance at 100 compared with cohort means at age 85. Discussion: An accurate portrayal of cognitive aging requires analyses that recognize substantial variability in individual trajectories and inter-individual differences.

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