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66/100

✓ Peer-reviewed alzhub usefulness score 66 out of 100. Prevention and risk

Topic: Gut, metabolism and diet

Plain-language summary

PURPOSE OF REVIEW: Nutrition constitutes an interesting approach for the prevention of age-related brain disorders. The objective of this review was to examine the most recent evidence on the association between adherence to a Mediterranean diet (MeDi) and cognitive health among elderly individuals. RECENT FINDINGS: Based on available epidemiological studies, two meta-analyses published in 2013 have underlined a protective effect of a greater MeDi adherence on cognitive health, including a reduced risk of Alzheimer's disease and cognitive impairment. Since then, six additional studies, from longitudinal cohorts or post-hoc analyses of randomized controlled trials conducted in the USA and Europe, have been published and provided mixed results. Potential reasons for such discrepancies include methodological limitations inherent to observational studies, and interactions between diet, environmental factors, such as those enhancing cognitive reserve, chronic diseases, and genetic factors. SUMMARY: Overall, available evidence suggests that the MeDi might exert a long-term beneficial effect on brain functioning. However, more high-powered observational studies with long-term follow-up for cognition and randomized controlled trials assessing the impact of shifting to a MeDi on cognitive functions are still needed in various populations.

Cite this study APA, Vancouver, BibTeX · download .bib or .ris

APA 7th

Feart, C., Samieri, C., & Barberger-Gateau, P. (2015). Mediterranean diet and cognitive health: an update of available knowledge. Current opinion in clinical nutrition and metabolic care. https://doi.org/10.1097/mco.0000000000000131

Vancouver

Feart C, Samieri C, Barberger-Gateau P. Mediterranean diet and cognitive health: an update of available knowledge. Current opinion in clinical nutrition and metabolic care. 2015. doi:10.1097/mco.0000000000000131. PMID: 25405316.

BibTeX

@article{feart2015-25405316,
  author  = {Feart, Catherine and Samieri, Cécilia and Barberger-Gateau, Pascale},
  title   = {{Mediterranean diet and cognitive health: an update of available knowledge}},
  journal = {Current opinion in clinical nutrition and metabolic care},
  year    = {2015},
  doi     = {10.1097/mco.0000000000000131},
  pmid    = {25405316},
  url     = {https://doi.org/10.1097/mco.0000000000000131}
}

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How to read this study

Design: this is a pooled review. It combines earlier studies, so it is only as good as the studies it pools. Check how many were included, whether they were similar enough to combine, and whether the authors report inconsistency between them.
Size: the record gives no participant count. Look for one in the original before trusting a pattern.
Effect: the record gives no effect size, so the summary above cannot say how large any difference was.

What the evidence grade means here

This page is graded high. alzhub.org assigns the grade automatically from keywords in the abstract, not from reading the paper. High means the abstract mentions a randomized design, a meta-analysis or a systematic review. It can add at most 5 of the 100 points in the study score, and it is a label about design, not a verdict on whether the findings are true.

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Key findings

Since then, six additional studies, from longitudinal cohorts or post-hoc analyses of randomized controlled trials conducted in the USA and Europe, have been published and provided mixed results.
SUMMARY: Overall, available evidence suggests that the MeDi might exert a long-term beneficial effect on brain functioning.

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Study details

Study designmeta-analysis
Evidence strengthHigh

How this study scored 66/100

Published in a peer-reviewed journal, and it is a meta-analysis pooling many studies. Scored zero for sample size, effect reported and studied in people 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, institution's track record, multicenter collaboration and free to read, so those were left out: it earned 37 of the 56 points we could judge it on, which is 66 out of 100.

Component	Points	Why
Journal tier	7 / 10	Tier 3 — peer-reviewed journal (Current opinion in clinical nutrition and metabolic care)
Journal's citation record	— / 4	No journal record from OpenAlex — left out of this score
Study design	12 / 12	A meta-analysis pooling many studies
Strength of evidence	5 / 5	Rated “high” in our summary
Peer-review validation	10 / 10	Peer-reviewed. Published as an article in a named peer-reviewed journal.
How recent	1 / 5	2015 — within 20 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)
Randomized / blinded	0 / 2	A review of other studies — randomization is not credited here
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
Multicenter collaboration	— / 3	Institutions not listed — left out of this score
Indexed in PubMed	2 / 2	Indexed in PubMed (PMID 25405316)
Free to read	— / 2	Access not recorded — left out of this score
Points	37 / 56	Scored on 10 of 20 parts. We have no data for the rest, so they are left out: 37 of the 56 points we could judge it on is 66 out of 100.
Total	66 / 100	—

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