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Olive oil and cognition: results from the three-city study
Berr C, Portet F, Carriere I, Akbaraly TN, Feart C, Gourlet V, Combe N, Barberger-Gateau P et al.. Dementia and geriatric cognitive disorders, 2009-10-30
Topic: Risk, prevention and care in population studies
Background Olive oil is a major component of the Mediterranean diet suggested to be beneficial to counteract Alzheimer's disease. Aim of the study Our objective was to examine the association between olive oil use, cognitive deficit and cognitive decline in a large elderly population. Methods We followed 6,947 subjects with a brief baseline food frequency questionnaire and repeated cognitive tests. Olive oil intake was categorized as none (22.7%), moderate (use for cooking or dressing, 39.9%) and intensive (use for both cooking and dressing, 37.4%). Associations between olive oil and cognitive outcomes were examined taking into account socio-economic factors, health behaviors, health measures and other dietary intakes. Results Participants with moderate or intensive use of olive oil compared to those who never used olive oil showed lower odds of cognitive deficit for verbal fluency and visual memory. For cognitive decline during the 4-year follow-up, the association with intensive use was significant for visual memory (adjusted OR = 0.83, 95% CI: 0.69-0.99) but not for verbal fluency (OR = 0.85, 95% CI: 0.70-1.03) in multivariate analysis. Conclusions This olive oil-cognition association needs to be confirmed by further studies. However, our findings already shed light on the potential importance of olive oil in the Mediterranean diet and on its beneficial effects on health.
Key findings
- Results Participants with moderate or intensive use of olive oil compared to those who never used olive oil showed lower odds of cognitive deficit for verbal fluency and visual memory.
- For cognitive decline during the 4-year follow-up, the association with intensive use was significant for visual memory (adjusted OR = 0.83, 95% CI: 0.69-0.99) but not for verbal fluency (OR = 0.85, 95% CI: 0.70-1.03) in multivariate analysis.
- However, our findings already shed light on the potential importance of olive oil in the Mediterranean diet and on its beneficial effects on health.
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Study details
- Participants6,947
- Effect size22.7%; 39.9%; 37.4%
- Evidence strengthLow
How this study scored 51/100
Published in a peer-reviewed journal. Scored zero for study design and randomised / blinded because the record does not state it. We have no data on journal's citation record, times cited, citations per year, impact for its field and year, cited by studies here, still being cited, senior author's track record and institution's track record, so those were left out: it earned 31 of the 61 points we could judge it on, which is 51 out of 100.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Dementia and geriatric cognitive disorders) |
| Journal's citation record | — / 4 | No journal record from OpenAlex — left out of this score |
| 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 | 1 / 5 | 2009 — within 20 year(s) of the newest study here |
| Sample size | 3 / 4 | 6,947 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 | — / 7 | No citation count (not found in OpenAlex) — left out of this score |
| Citations per year | — / 5 | No citation count or no year — left out of this score |
| Impact for its field and year | — / 6 | No field-weighted citation impact (OpenAlex has none yet) — left out of this score |
| Cited by studies here | — / 6 | Not yet checked against this library's citation graph — left out of this score |
| Still being cited | — / 4 | No yearly citation counts — left out of this score |
| Senior author's track record | — / 4 | Senior author's record not available — left out of this score |
| Institution's track record | — / 3 | No institution listed in OpenAlex — left out of this score |
| Multi-centre collaboration | 2 / 3 | PubMed indexes it as a multicentre study |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 19887798) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Points | 31 / 61 | Scored on 12 of 20 parts. We have no data for the rest, so they are left out: 31 of the 61 points we could judge it on is 51 out of 100. |
| Total | 51 / 100 | — |
What each of these 20 components measures, and what this score is not →
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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. 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.
APA 7th
Berr, C., Portet, F., Carriere, I., Akbaraly, T. N., Feart, C., Gourlet, V., et al. (2009). Olive oil and cognition: results from the three-city study. Dementia and geriatric cognitive disorders. https://doi.org/10.1159/000253483
Vancouver
Berr C, Portet F, Carriere I, Akbaraly TN, Feart C, Gourlet V, et al. Olive oil and cognition: results from the three-city study. Dementia and geriatric cognitive disorders. 2009. doi:10.1159/000253483. PMID: 19887798.
BibTeX
@article{berr2009-19887798,
author = {Berr, C. and Portet, F. and Carriere, I. and Akbaraly, T. N. and Feart, C. and Gourlet, V. and Combe, N. and Barberger-Gateau, P. and others},
title = {{Olive oil and cognition: results from the three-city study}},
journal = {Dementia and geriatric cognitive disorders},
year = {2009},
doi = {10.1159/000253483},
pmid = {19887798},
url = {https://doi.org/10.1159/000253483}
}
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