Home › Research › Risk factors
Association of Sleep Variables With Cognitive Performance and the Risk of Dementia in the Sleep and Dementia Consortium
Stephanie R Yiallourou, Crystal Wiedner, Qiong Yang, Andrée‐Ann Baril, Jeffrey R. Misialek, Christopher E. Kline, Stephanie Harrison, Rebecca Bernal et al.. Neurology, 2026-07-29
Topic: Risk, prevention and care in population studies
= 0.039) were associated with better global cognition. However, no significant associations were identified between the 9 sleep composites and dementia risk. Sleep composites were not significantly associated with dementia risk. However, longer, more consolidated sleep and stronger slow oscillation-spindle coupling were associated with cognitive performance. These composites may be useful in guiding further investigations of sleep-brain health relationships.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Yiallourou, S. R., Wiedner, C., Yang, Q., Baril, A., Misialek, J. R., Kline, C. E., et al. (2026). Association of Sleep Variables With Cognitive Performance and the Risk of Dementia in the Sleep and Dementia Consortium. Neurology. https://doi.org/10.1212/wnl.0000000000218182
Vancouver
Yiallourou SR, Wiedner C, Yang Q, Baril A, Misialek JR, Kline CE, et al. Association of Sleep Variables With Cognitive Performance and the Risk of Dementia in the Sleep and Dementia Consortium. Neurology. 2026. doi:10.1212/wnl.0000000000218182. PMID: 42525904.
BibTeX
@article{yiallourou2026-42525904,
author = {Yiallourou, Stephanie R and Wiedner, Crystal and Yang, Qiong and Baril, Andrée‐Ann and Misialek, Jeffrey R. and Kline, Christopher E. and Harrison, Stephanie and Bernal, Rebecca and others},
title = {{Association of Sleep Variables With Cognitive Performance and the Risk of Dementia in the Sleep and Dementia Consortium}},
journal = {Neurology},
year = {2026},
doi = {10.1212/wnl.0000000000218182},
pmid = {42525904},
url = {https://doi.org/10.1212/wnl.0000000000218182}
}
Built from the record alzhub holds for this paper, not looked up. Volume, issue and page numbers are not held in the record. The record's author list ends in “et al.”, so not every author is named. Check the citation against the original before you use it.
Key findings
- = 0.039) were associated with better global cognition.
- However, no significant associations were identified between the 9 sleep composites and dementia risk.
- Sleep composites were not significantly associated with dementia risk.
- However, longer, more consolidated sleep and stronger slow oscillation-spindle coupling were associated with cognitive performance.
- These composites may be useful in guiding further investigations of sleep-brain health relationships.
Why it matters
This study found no significant link between nine sleep measures and dementia risk, but longer, more consolidated sleep and stronger slow oscillation-spindle coupling were linked to better cognitive performance. The results do not support sleep measures as direct predictors of dementia risk, though they may still be useful for guiding further research.
New to this subject? Start with our plain-English guide: Risk factors, ranked →
Study details
- Evidence strengthLow
How this study scored 45/100
Published in a leading specialty journal. Scored zero for study design, sample size, effect reported, studied in people and randomised / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 9 / 10 | Tier 2 — leading specialty journal (Neurology) |
| Journal's citation record | 4 / 4 | Neurology: journal h-index 525 (OpenAlex, 2026-10-29) |
| Study design | 0 / 12 | No study design recorded — scores zero, not guessed (not stated in the record — scored 0) |
| Strength of evidence | 1 / 5 | Rated “low” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 5 / 5 | 2026 — within 1 year(s) of the newest study here |
| Sample size | 0 / 4 | Participant count not stated — scores zero (not stated in the record — scored 0) |
| Effect reported | 0 / 3 | No effect size reported — scores zero (not stated in the record — scored 0) |
| Studied in people | 0 / 3 | Not stated whether this was studied in people — scores zero (not stated in the record — scored 0) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 1 / 7 | Cited 1 times (OpenAlex, 2026-10-10) |
| Citations per year | 0 / 5 | 0.5 citations a year over 2 year(s) since 2026 |
| Impact for its field and year | 4 / 6 | Cited 8.4× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 0 / 6 | No other study in this library cites it |
| Still being cited | 0 / 4 | Cited 1 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 3 / 4 | Last-listed author Jayandra Jung Himali: h-index 57 (OpenAlex, whole career) |
| Institution's track record | 3 / 3 | Harvard University: institution h-index 3,235 (OpenAlex) |
| Multi-centre collaboration | 3 / 3 | OpenAlex lists 24 institution(s) in 4 countries |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 42525904) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 45 / 100 | — |
What each of these 20 components measures, and what this score is not →
Read the original
May need a subscription OpenAlex found no free copy of the full text (checked 6 Feb 1020), so the publisher may charge for it. The PubMed abstract is free.
Studies this one cites
Referenced by this study and also in the alzhub library, so you can read them here. Showing 12 of 13.
Related studies in Risk factors
Also tagged “biobank”
1,084 studies in the library carry the topic tag “biobank”; these are this study's neighbours in a fixed, alphabetical-by-hash tour of them, not the closest in content. All 1,084 tagged studies.