Sex differences in cognition are stable over a 10-year period in adulthood and old age.

The Betula Longitudinal Study is funded by the Bank of Sweden Tercentenary Foundation (Grant 1988-0082:17), Swedish Council for Planning and Coordination of Research (Grants D1988-0092, D1989-0115, D1990-0074, D1991-0258, D1992-0143, D1997-0756, D1997-1841, D1999-0739, and B1999-474), Swedish Council for Research in the Humanities and Social Sciences (Grant F377/1988-2000), and Swedish Council for Social Research (1998-1990: Grants 88-0082 and 311/1991-2000).
Sex differences in declarative memory and visuospacial ability are robust in cross-sectional studies. The present longitudinal study examined whether sex differences in cognition were present over a 10-year period, and whether age modified the magnitude of sex differences. Tests assessing episodic and semantic memory, and visuospatial ability were administered to 625 nondemented adults (initially aged 35-80 years), participating in the population based Betula study at two follow-up occasions. There was stability of sex differences across five age groups and over a 10-year period. Women performed at a higher level than men on episodic recall, face and verbal recognition, and semantic fluency, whereas men performed better than women on a task assessing visuospatial ability. Sex differences in cognitive functions are stable over a 10-year period and from 35 to 90 years of age. Decreasing levels of estrogen in women and sex differences in age-related cortical atrophy do not seem to influence cognitive sex differences.

Nilsson, Lars-GöranStockholms universitet,Psykologiska institutionen(Swepub:su)lgn (författare)
Herlitz, AgnetaKarolinska Institutet (författare)
Stockholms universitetPsykologiska institutionen (creator_code:org_t)

Ingår i:Aging, Neuropsychology and Cognition: Informa UK Limited13:3-4, s. 574-5871382-55851744-4128

Av författaren/redakt...: de Frias, Cindy; Nilsson, Lars-Gö ...; Herlitz, Agneta

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