White Matter Hyperintensities and the Progression of Frailty—The Tasmanian Study of Cognition and Gait

Timothy P Siejka, Velandai K Srikanth, Ruth E Hubbard, Chris Moran, Richard Beare, Amanda Wood, Thanh Phan, Saliu Balogun, Michele L Callisaya, Anne Newman (Editor)

Research output: Contribution to journalArticle

Abstract

Background
The contribution of cerebral small vessel disease (cSVD) to the pathogenesis of frailty remains uncertain. We aimed to examine the associations between cSVD with progression of frailty in a population-based study of older people.

Methods
People aged between 60 and 85 years were randomly selected form the electoral roll to participate in the Tasmanian Study of Cognition and Gait. Participants underwent self-reported questionnaires, objective gait, cognitive and sensorimotor testing over three phases ranging between 2005 and 2012. These data were used to calculate a 41-item frailty index (FI) at three time points. Baseline brain magnetic resonance imaging was performed on all participants to measure cSVD. Generalized mixed models were used to examine associations between baseline cSVD and progression of frailty, adjusted for confounders of age, sex, level of education, and total intracranial volume.

Results
At baseline (n = 388) mean age was 72 years (SD = 7.0), 44% were female, and the median FI score was 0.20 (interquartile range [IQR] 0.12, 0.27). In fully adjusted models higher burden of baseline white matter hyperintensity (WMH) was associated with frailty progression over 4.4 years (β = 0.03, 95% CI: 0.01, 0.05; p = .004) independent of other SVD markers. Neither baseline infarcts (p = .23), nor microbleeds at baseline (p = .65) were associated with progression of frailty.

Conclusions
We provide evidence for an association between baseline WMHs and progression of frailty. Our findings add to a growing body of literature suggesting WMH is a marker for frailty.
Original languageEnglish
Pages (from-to)1545-1550
Number of pages6
JournalJournals of Gerontology: Series A
Volume75
Issue number8
Early online date20 Jan 2020
DOIs
Publication statusPublished - 1 Aug 2020

Keywords

  • Geriatric assessment
  • MRI
  • White matter hyperintensity

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    Siejka, T. P., Srikanth, V. K., Hubbard, R. E., Moran, C., Beare, R., Wood, A., Phan, T., Balogun, S., Callisaya, M. L., & Newman, A. (Ed.) (2020). White Matter Hyperintensities and the Progression of Frailty—The Tasmanian Study of Cognition and Gait. Journals of Gerontology: Series A, 75(8), 1545-1550. https://doi.org/10.1093/gerona/glaa024