Home › Research › Getting a diagnosis
Dementia prevalence in the Wisconsin Longitudinal Study
Victoria J. Williams, Ralph Møller Trane, Kamil Sicinski, Carol Roan, Kate Lange, Kerryann DiLoreto, Brittani J. Strait, Anne M Fischer et al.. Alzheimer s & Dementia, 2025-09-29
Topic: Risk, prevention and care in population studies
Cognitive status was determined for 5414 participants, with a dementia prevalence of 8.9% when assessed at a mean age of 81 years. The WLS offers prospectively collected data covering nearly every facet of participant's lives from high school to late life. When combined with newly defined dementia outcomes, the WLS dataset offers a valuable resource to explore full life course determinants of dementia.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Williams, V. J., Trane, R. M., Sicinski, K., Roan, C., Lange, K., DiLoreto, K., et al. (2025). Dementia prevalence in the Wisconsin Longitudinal Study. Alzheimer s & Dementia. https://doi.org/10.1002/alz.70714
Vancouver
Williams VJ, Trane RM, Sicinski K, Roan C, Lange K, DiLoreto K, et al. Dementia prevalence in the Wisconsin Longitudinal Study. Alzheimer s & Dementia. 2025. doi:10.1002/alz.70714. PMID: 41020424.
BibTeX
@article{williams2025-41020424,
author = {Williams, Victoria J. and Trane, Ralph Møller and Sicinski, Kamil and Roan, Carol and Lange, Kate and DiLoreto, Kerryann and Strait, Brittani J. and Fischer, Anne M and others},
title = {{Dementia prevalence in the Wisconsin Longitudinal Study}},
journal = {Alzheimer s \& Dementia},
year = {2025},
doi = {10.1002/alz.70714},
pmid = {41020424},
url = {https://doi.org/10.1002/alz.70714}
}
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
- Cognitive status was determined for 5414 participants, with a dementia prevalence of 8.9% when assessed at a mean age of 81 years.
- The WLS offers prospectively collected data covering nearly every facet of participant's lives from high school to late life.
- When combined with newly defined dementia outcomes, the WLS dataset offers a valuable resource to explore full life course determinants of dementia.
Why it matters
This study reports a dementia prevalence of 8.9% in a Wisconsin cohort assessed at a mean age of 81 years. The dataset offers a resource to explore life course determinants of dementia, not a treatment or cure.
New to this subject? Start with our plain-English guide: Getting a diagnosis →
Study details
- Study designcohort study
- Participants5,414
- Effect size8.9%
- Evidence strengthModerate
How this study scored 55/100
Published in a peer-reviewed journal, and it is a cohort study following people over time. Scored zero for randomised / blinded because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Alzheimer s & Dementia) |
| Journal's citation record | 2 / 4 | Alzheimer s & Dementia: journal h-index 228 (OpenAlex, 2026-10-29) |
| Study design | 7 / 12 | A cohort study following people over time |
| Strength of evidence | 3 / 5 | Rated “moderate” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 4 / 5 | 2025 — within 3 year(s) of the newest study here |
| Sample size | 3 / 4 | 5,414 participants |
| Effect reported | 2 / 3 | Effect reported as a number, without an interval or test |
| Studied in people | 3 / 3 | Studied in people (participant count stated) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | 1 / 7 | Cited 2 times (OpenAlex, 2026-10-10) |
| Citations per year | 0 / 5 | 0.7 citations a year over 3 year(s) since 2025 |
| Impact for its field and year | 2 / 6 | Cited 1.3× 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 2 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 4 / 4 | Last-listed author Sanjay Asthana: h-index 101 (OpenAlex, whole career) |
| Institution's track record | 2 / 3 | University of Michigan: institution h-index 2,240 (OpenAlex) |
| Multi-centre collaboration | 1 / 3 | OpenAlex lists 3 institution(s) in 1 country |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 41020424) |
| Free to read | 2 / 2 | Free to read |
| Total | 55 / 100 | — |
What each of these 20 components measures, and what this score is not →
Read the original
Full text: free to read — OpenAlex lists this copy as free to read: the link above (checked 6 Feb 1020).
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 Getting a diagnosis
Also tagged “prevalence”
1,224 studies in the library carry the topic tag “prevalence”; these are this study's neighbours in a fixed, alphabetical-by-hash tour of them, not the closest in content. All 1,224 tagged studies.