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Twenty-year changes in dementia occurrence suggest decreasing incidence in central Stockholm, Sweden
Qiu C, von Strauss E, Bäckman L, Winblad B, Fratiglioni L.. Neurology, 2013-04-17
Topic: Risk, prevention and care in population studies
Objective To explore whether prevalence, survival, and incidence of dementia have changed from 1987-1994 to 2001-2008 in Stockholm, Sweden. Methods This study is based on 2 cross-sectional surveys of people aged 75 years or over conducted in central Stockholm: the Kungsholmen Project (KP) (1987-1989, n = 1,700) and the Swedish National study on Aging and Care in Kungsholmen (SNAC-K) (2001-2004, n = 1,575). In both surveys we diagnosed dementia according to DSM-III-R criteria, following the identical diagnostic procedure.
Key findings
- Methods This study is based on 2 cross-sectional surveys of people aged 75 years or over conducted in central Stockholm: the Kungsholmen Project (KP) (1987-1989, n = 1,700) and the Swedish National study on Aging and Care in Kungsholmen (SNAC-K) (2001-2004, n = 1,575).
- In both surveys we diagnosed dementia according to DSM-III-R criteria, following the identical diagnostic procedure.
- Death certificates were used to determine survival status of KP participants as of December 1994 and SNAC-K participants as of June 2008.
- We used logistic and Cox models to compare prevalence and survival, controlling for major confounders.
Why it matters
Two surveys of people aged 75 and over in central Stockholm, in 1987-1989 (1,700 people) and 2001-2004 (1,575 people), diagnosed dementia with the identical procedure, so the two periods can be compared fairly. The authors report that the changes "suggest decreasing incidence" of dementia, meaning fewer new cases. The summary stored here gives no figures and names no cause. This is one district's trend in how often dementia occurs. It does not show that anything prevents dementia.
Study details
- Study designcross-sectional
- Participants1,700
- Effect size17.5%; 12.8%; 19.2%
- Evidence strengthLow
How this study scored 75/100
Published in a leading specialty journal, and it is a randomised controlled trial.
| 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 | 11 / 12 | A randomised controlled trial (from PubMed type “Randomized Controlled Trial”) |
| 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 | 1 / 5 | 2013 — within 20 year(s) of the newest study here |
| Sample size | 3 / 4 | 1,700 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 | 1 / 2 | Randomised (as stated in the record) |
| Times cited | 6 / 7 | Cited 308 times (OpenAlex, 2026-10-10) |
| Citations per year | 4 / 5 | 20.5 citations a year over 15 year(s) since 2013 |
| Impact for its field and year | 5 / 6 | Cited 26.5× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 4 / 6 | Cited by 40 other studies in this library |
| Still being cited | 2 / 4 | Cited 16 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 4 / 4 | Last-listed author Laura Fratiglioni: h-index 133 (OpenAlex, whole career) |
| Institution's track record | 1 / 3 | Karolinska Institutet: institution h-index 1,477 (OpenAlex) |
| Multi-centre collaboration | 2 / 3 | OpenAlex lists 4 institution(s) in 1 country |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 23596063) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 75 / 100 | — |
What each of these 20 components measures, and what this score is not →
Read the original
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Cite this study APA, Vancouver, BibTeX · download .bib or .ris
Built from the record alzhub holds for this paper, not looked up. Volume, issue and page numbers are not held in the record. Check the citation against the original before you use it.
APA 7th
Qiu, C., von Strauss, E., Bäckman, L., Winblad, B., & Fratiglioni, L. (2013). Twenty-year changes in dementia occurrence suggest decreasing incidence in central Stockholm, Sweden. Neurology. https://doi.org/10.1212/wnl.0b013e318292a2f9
Vancouver
Qiu C, von Strauss E, Bäckman L, Winblad B, Fratiglioni L. Twenty-year changes in dementia occurrence suggest decreasing incidence in central Stockholm, Sweden. Neurology. 2013. doi:10.1212/wnl.0b013e318292a2f9. PMID: 23596063.
BibTeX
@article{qiu2013-23596063,
author = {Qiu, C. and von Strauss, E. and Bäckman, L. and Winblad, B. and Fratiglioni, L.},
title = {{Twenty-year changes in dementia occurrence suggest decreasing incidence in central Stockholm, Sweden}},
journal = {Neurology},
year = {2013},
doi = {10.1212/wnl.0b013e318292a2f9},
pmid = {23596063},
url = {https://doi.org/10.1212/wnl.0b013e318292a2f9}
}
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