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46/100

✓ Peer-reviewed alzhub usefulness score 46 out of 100. Genetics

Topic: Amyloid, tau and blood-test diagnosis

We analyzed data from 1,542 participants (mean age = 72.2 years, SD = 7.2; 50.8% female; mean education = 16.3 years, SD = 2.6) and found that APOE4 was associated with steeper declines in episodic memory as a function of Aβ duration. Homozygous APOE4 carriers (4/4) exhibited the most pronounced decline, followed by heterozygotes (3/4), with noncarriers (3/3) showing the slowest decline. This genotype-dependent pattern was specific to episodic memory; no consistent or meaningful differences were observed across other cognitive domains. In all genotype groups, episodic memory was the first domain to show impairment. However, the lag between memory decline and subsequent nonmemory decline was substantially longer in APOE homozygote individuals compared with the other groups, suggesting a more domain-specific vulnerability early in the disease process. These findings suggest that APOE4 carriers, particularly homozygotes, exhibit reduced cognitive resilience to Aβ accumulation, but that this effect is largely specific to episodic memory. These findings indicate that cognitive trajectories in AD differ by APOE genotype, highlighting the importance of examining clinical symptoms in the context of APOE status. Future research should investigate whether these differences are driven by distinct pathologic mechanisms in APOE4 carriers.

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

APA 7th

Vanderlip, C. R., & Stark, C. E. (2025). Time Course and Severity of Cognitive Changes as a Function of Aβ Positivity and APOE Genotype in Alzheimer Disease. Neurology. https://doi.org/10.1212/wnl.0000000000213853

Vancouver

Vanderlip CR, Stark CE. Time Course and Severity of Cognitive Changes as a Function of Aβ Positivity and APOE Genotype in Alzheimer Disease. Neurology. 2025. doi:10.1212/wnl.0000000000213853. PMID: 40577676.

BibTeX

@article{vanderlip2025-40577676,
  author  = {Vanderlip, Casey R. and Stark, Craig E.L.},
  title   = {{Time Course and Severity of Cognitive Changes as a Function of Aβ Positivity and APOE Genotype in Alzheimer Disease}},
  journal = {Neurology},
  year    = {2025},
  doi     = {10.1212/wnl.0000000000213853},
  pmid    = {40577676},
  url     = {https://doi.org/10.1212/wnl.0000000000213853}
}

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Key findings

We analyzed data from 1,542 participants (mean age = 72.2 years, SD = 7.2; 50.8% female; mean education = 16.3 years, SD = 2.6) and found that APOE4 was associated with steeper declines in episodic memory as a function of Aβ duration.
Homozygous APOE4 carriers (4/4) exhibited the most pronounced decline, followed by heterozygotes (3/4), with noncarriers (3/3) showing the slowest decline.
This genotype-dependent pattern was specific to episodic memory; no consistent or meaningful differences were observed across other cognitive domains.
In all genotype groups, episodic memory was the first domain to show impairment.
However, the lag between memory decline and subsequent nonmemory decline was substantially longer in APOE homozygote individuals compared with the other groups, suggesting a more domain-specific vulnerability early in the disease process.

Why it matters

Among people with amyloid buildup, APOE4 carriers, especially those with two copies, showed steeper declines in episodic memory, while other cognitive domains showed no consistent differences. The authors call for future research into whether these differences come from distinct pathologic mechanisms in APOE4 carriers.

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Study details

Participants1,542
Effect size50.8%
Evidence strengthLow

How this study scored 46/100

Published in a leading specialty journal. Scored zero for study design 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	4 / 5	2025 — within 3 year(s) of the newest study here
Sample size	3 / 4	1,542 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 1 times (OpenAlex, 2026-10-10)
Citations per year	0 / 5	0.3 citations a year over 3 year(s) since 2025
Impact for its field and year	1 / 6	Cited 0.6× 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 Craig E.L. Stark: h-index 62 (OpenAlex, whole career)
Institution's track record	1 / 3	University of California, Irvine: institution h-index 1,195 (OpenAlex)
Multi-centre collaboration	0 / 3	OpenAlex lists 1 institution(s) in 1 country — scores zero (affiliation lists can be incomplete)
Indexed in PubMed	2 / 2	Indexed in PubMed (PMID 40577676)
Free to read	2 / 2	Free to read
Total	46 / 100	—

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