Is Obstructive Sleep Apnoea Related to Neuropsychological Function in Healthy Older Adults? A Systematic Review and Meta-Analysis

  • Nathan Cross
  • Amit Lampit
  • Jonathon Pye
  • Ronald R. Grunstein
  • Nathaniel Marshall
  • Sharon L. Naismith
Review

DOI: 10.1007/s11065-017-9344-6

Cite this article as:
Cross, N., Lampit, A., Pye, J. et al. Neuropsychol Rev (2017). doi:10.1007/s11065-017-9344-6

Abstract

Previous systematic reviews and meta-analyses have identified cognitive deficits in adults with obstructive sleep apnoea (OSA). However, quantitative analysis of the association between OSA and neuropsychological performance has not been conducted specifically in older adults, for whom there is a greater risk of cognitive decline. We searched Medline, Embase and PsycINFO through August 2016 for studies describing associations between OSA and neuropsychological outcomes in people aged>50 years. Meta-analyses were performed on these studies for overall cognition and within cognitive domains. Subgroup analyses were performed taking into account risk of bias and moderating differences in study design. 13 studies met eligibility criteria for analysis. A small negative association was found between OSA and all neuropsychological outcomes combined, g=0.18(95% CI 0.04–0.32), and in memory and processing speed domains. Small case-control studies from sleep clinic populations observed the greatest associations, while larger cohort studies from community samples illustrated no association. Analysis accounting for publication bias resulted in a null overall association, g=0.02 (95%CI -0.12 to 0.16). Associations between OSA and cognition in later life are highly variable and the findings differ based on the type and setting of study. It appears some older adults may be at risk of cognitive impairments attributable to OSA; however, the risk of bias renders the evidence inconclusive. High quality research is warranted in clinically diagnosed OSA patients as well as those already experiencing neuropsychological impairment and who may be regarded at higher risk of further cognitive decline.

Keywords

Ageing Sleep OSA Apnoea Cognitive decline 

Supplementary material

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.School of PsychologyThe University of SydneyCamperdownAustralia
  2. 2.Woolcock Institute of Medical ResearchThe University of SydneyCamperdownAustralia
  3. 3.Charles Perkins CentreThe University of SydneyCamperdownAustralia
  4. 4.Brain and Mind CentreThe University of SydneyCamperdownAustralia
  5. 5.Neurosleep, NHMRC Centre of Research ExcellenceThe University of SydneyCamperdownAustralia
  6. 6.Sydney Health PartnersThe University of SydneyCamperdownAustralia
  7. 7.Sydney Nursing SchoolThe University of SydneyCamperdownAustralia

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