Brain structural differences between 73- and 92-year olds matched for childhood intelligence, social background, and intracranial volume

Stuart J Ritchie, David Alexander Dickie, Simon Cox, Maria Valdes Hernandez, Ruth Sibbett, Alison Pattie, Devasuda Anblagan, Paul Redmond, Natalie Royle, Janie Corley, Susana Muñoz Maniega, Adele Taylor, Sherif Karama, Thomas Booth, Alan Gow, John Starr, Mark Bastin, Joanna Wardlaw, Ian Deary

Research output: Contribution to journalArticlepeer-review

Abstract

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.
Original languageEnglish
Pages (from-to)146-158
JournalNeurobiology of Aging
Volume62
Early online date16 Oct 2017
DOIs
Publication statusPublished - Feb 2018

Keywords / Materials (for Non-textual outputs)

  • ageing
  • structural MRI
  • brain volume
  • white matter hyperintensities
  • lesion mapping

Fingerprint

Dive into the research topics of 'Brain structural differences between 73- and 92-year olds matched for childhood intelligence, social background, and intracranial volume'. Together they form a unique fingerprint.

Cite this