Rxivist logo

Brain Structural Differences Between 73- And 92-Year Olds Matched For Childhood Intelligence, Social Background, And Intracranial Volume

By Stuart J. Ritchie, David Alexander Dickie, Simon R Cox, Maria del. C Valdés Hernández, Alison Pattie, Devasuda Anblagan, Paul Redmond, Natalie A. Royle, Janie Corley, Susana Muñoz Maniega, Adele M. Taylor, Sherif Karama, Tom Booth, Alan J. Gow, John M. Starr, Mark E Bastin, Joanna Wardlaw, Ian J Deary

Posted 09 May 2017
bioRxiv DOI: 10.1101/135871 (published DOI: 10.1016/j.neurobiolaging.2017.10.005)

Fully characterizing age differences in the brain is a key task for combatting ageing-related cognitive decline. Using propensity score matching on two independent, narrow-age cohorts, we used data on childhood cognitive ability, socioeconomic background, and intracranial volume to match participants at mean age 92 years (n = 42) to very similar participants at mean age 73 (n = 126). Examining a variety of global and regional structural neuroimaging variables, there were large differences in grey and white matter volumes, cortical surface area, cortical thickness, and white matter hyperintensity volume and spatial extent. In a mediation analysis, the total volume of white matter hyperintensities and total cortical surface area jointly mediated 24.9% of the relation between age and general cognitive ability (tissue volumes and cortical thickness were not significant mediators in this analysis). These findings provide an unusual and valuable perspective on neurostructural ageing, in which brains from the eighth and tenth decades of life differ widely despite the same cognitive, socio-economic, and brain-volumetric starting points.

Download data

  • Downloaded 386 times
  • Download rankings, all-time:
    • Site-wide: 39,143 out of 83,873
    • In neuroscience: 6,779 out of 14,943
  • Year to date:
    • Site-wide: 77,780 out of 83,873
  • Since beginning of last month:
    • Site-wide: 73,412 out of 83,873

Altmetric data


Downloads over time

Distribution of downloads per paper, site-wide


PanLingua

Sign up for the Rxivist weekly newsletter! (Click here for more details.)


News