Baseline sleep microstructure and ten-year cognitive change in older Danish men
In older men from a Danish birth cohort, baseline sleep microstructure measured by polysomnography was associated with cognition at that time and with cognitive change over ten years; the authors call these exploratory candidate markers. [1]
Automatic summary · not editorially reviewed
The key findings
Polysomnography was performed at baseline only, and microstructure analyses covered 82 men with adequate non-REM sleep. [1]
Over ten years, processing speed and symbol conversion declined significantly. [1]
The authors call the findings exploratory and say further longitudinal studies are needed to determine predictive value for neurodegenerative disease. [1]
The source at a glance
- Study type / format
- Longitudinal cohort study (abstract)
- Population / context
- Older men from the Metropolit 1953 Danish Male Birth Cohort
- Summary based on
- Study abstract
- Original publication
- August 20, 2026
Danish male cohort tested twice a decade apart
The study followed men from the Metropolit 1953 Danish Male Birth Cohort. Cognitive assessment took place at two time points a decade apart, in 2010-2013 and 2020-2022. There were 206 participants at baseline and 106 at follow-up. Polysomnography, a sleep recording, was performed at baseline only, in 176 men. The microstructure analyses of sleep spindles, slow waves and EEG coherence were restricted to the 82 participants with adequate non-REM sleep.
Supporting source [1]
Cognitive decline and links to sleep measures
Over ten years, processing speed and symbol conversion declined significantly. Higher sleep efficiency was associated with better cognitive maintenance. More wake after sleep onset and a higher arousal index correlated with poorer memory and learning. A higher proportion of N1 sleep was linked to poorer executive function, while N2 and N3 were positively associated with cognitive outcomes. Fast spindle amplitude and frequency, slow-wave characteristics, and N2 and REM coherence correlated with processing speed, attention and global cognition.
Supporting source [1]
Exploratory associations, not predictive proof
The authors describe the findings as exploratory and call the sleep measures candidate markers of cognitive resilience or decline. They state that further longitudinal studies are needed to determine their predictive value for neurodegenerative disease. The abstract reports associations, not causes, and does not establish that sleep microstructure predicts later disease.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The sleep recording was done at baseline only, so later sleep was not measured. The microstructure sample was small (82 men), and the authors call the findings exploratory. Associations do not show causation or predictive value.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Urdanibia-Centelles O, Arvedsen S, Brink-Kjær A, Lauritzen M, Benedek K, Jennum P. · europepmc.org · August 20, 2026