Sex and age differences in atrophic rates: An ADNI study with n=1368 MRI scans

Xue Hua, Derrek P. Hibar, Suh Lee, Arthur W. Toga, Clifford R. Jack, Michael W. Weiner, Paul M. Thompson

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

We set out to determine factors that influence the rate of brain atrophy in 1-year longitudinal magnetic resonance imaging (MRI) data. With tensor-based morphometry (TBM), we mapped the 3-dimensional profile of progressive atrophy in 144 subjects with probable Alzheimer's disease (AD) (age: 76.5 ± 7.4 years), 338 with amnestic mild cognitive impairment (MCI; 76.0 ± 7.2), and 202 healthy controls (77.0 ± 5.1), scanned twice, 1 year apart. Statistical maps revealed significant age and sex differences in atrophic rates. Brain atrophic rates were about 1%-1.5% faster in women than men. Atrophy was faster in younger than older subjects, most prominently in mild cognitive impairment, with a 1% increase in the rates of atrophy and 2% in ventricular expansion, for every 10-year decrease in age. TBM-derived atrophic rates correlated with reduced beta-amyloid and elevated tau levels (n = 363) at baseline, baseline and progressive deterioration in clinical measures, and increasing numbers of risk alleles for the ApoE4 gene. TBM is a sensitive, high-throughput biomarker for tracking disease progression in large imaging studies; sub-analyses focusing on women or younger subjects gave improved sample size requirements for clinical trials.

Original languageEnglish (US)
Pages (from-to)1463-1480
Number of pages18
JournalNeurobiology of aging
Volume31
Issue number8
DOIs
StatePublished - Aug 1 2010

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Keywords

  • Age
  • Alzheimer's disease
  • Atrophy rate
  • Biomarker
  • Drug trial enrichment
  • Longitudinal
  • MRI
  • Mild cognitive impairment
  • Neuroimaging
  • Sex effect
  • Tensor-based morphometry

ASJC Scopus subject areas

  • Neuroscience(all)
  • Aging
  • Clinical Neurology
  • Developmental Biology
  • Geriatrics and Gerontology

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