Evidence map›Paper›PMID 33857772›Full record

ArticleNeuroImage. Clinical2021

Sex differences in brain aging among adults with family history of Alzheimer's disease and APOE4 genetic risk.

Sivaniya Subramaniapillai, Sricharana Rajagopal, Jamie Snytte, A Ross Otto, PREVENT-AD Research Group, Gillian Einstein, M Natasha Rajah

Open access · goldAbstract read
In one paragraph

Article in NeuroImage. Clinical, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
4.6field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 40 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. The PREVENT-AD cohort: Accelerating Alzheimer's disease research and treatment in Canada and beyond.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  5. Review
  6. Observational
  7. Article
  8. Self-guided Knowledge-Injected Graph Neural Network for Alzheimer's Diseases.Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention · 2024
    Article
  9. Article
  10. ERRα and ERRγ coordinate expression of genes associated with Alzheimer's disease, inhibitingProceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Impact of sex and APOE-Frontiers in neurology · 2023
    Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Sivaniya SubramaniapillaiDepartment of Psychology, McGill University, 2001 Avenue McGill College, Montréal, QC H3A 1G1, Canada; Brain Imaging Centre, Douglas Institute Research Centre, 6875 LaSalle Blvd Verdun, Montréal, QC H4H 1R3, Canada. Electronic address: sivaniya.subramaniapillai@mail.mcgill.ca.
Sricharana RajagopalBrain Imaging Centre, Douglas Institute Research Centre, 6875 LaSalle Blvd Verdun, Montréal, QC H4H 1R3, Canada.
Jamie SnytteDepartment of Psychology, McGill University, 2001 Avenue McGill College, Montréal, QC H3A 1G1, Canada; Brain Imaging Centre, Douglas Institute Research Centre, 6875 LaSalle Blvd Verdun, Montréal, QC H4H 1R3, Canada.
A Ross OttoDepartment of Psychology, McGill University, 2001 Avenue McGill College, Montréal, QC H3A 1G1, Canada.
PREVENT-AD Research Group
Gillian EinsteinDepartment of Psychology, University of Toronto, 100 St. George Street, Toronto, ON M5S 3G3, Canada; Rotman Research Institute, Baycrest Hospital, 3560 Bathurst St, Toronto, ON M6A 2E1, Canada; Tema Genus, Linköping University, TEMA-huset, Entrance 37, Room E433, Campus Valla, Linköping, Sweden.
M Natasha RajahBrain Imaging Centre, Douglas Institute Research Centre, 6875 LaSalle Blvd Verdun, Montréal, QC H4H 1R3, Canada; Department of Psychiatry, Faculty of Medicine, McGill University, 1033 Avenue des Pins, Montréal, QC H3A 1A1, Canada. Electronic address: maria.rajah@mcgill.ca.
McGill University · CABaycrest Hospital · CA

Funding

CIHR 201610PJT-153321CIHR GS9-171369
6 · The paper itself

Abstract

Emerging evidence suggests that Alzheimer's Disease (AD) risk factors may differentially contribute to disease trajectory in women than men. Determining the effect of AD risk factors on brain aging in women, compared to men, is critical for understanding whether there are sex differences in the pathways towards AD in cognitively intact but at-risk adults. Brain Age Gap (BAG) is a concept used increasingly as a measure of brain health; BAG is defined as the difference between predicted age (based on structural MRI) and chronological age, with negative values reflecting preserved brain health with age. Using BAG, we investigated whether there were sex differences in the brain effects of AD risk factors (i.e., family history of AD, and carrying an apolipoprotein E ε4 allele [+APOE4]) in cognitively intact adults, and if this relationship was moderated by modifiable factors (i.e. body mass index [BMI], blood pressure and physical activity). We undertook a cross-sectional study of structural MRIs from 1067 cognitively normal adults across four neuroimaging datasets. An elastic net regression model found that women with a family history of AD and +APOE4 genotype had more advanced brain aging than their male counterparts. In a sub-cohort of women with those risk factors, higher BMI was associated with less brain aging whereas lower BMI was not. In a sub-cohort of women and men with +APOE4, engaging in physical activity was more beneficial to men's brain aging than women's. Our results demonstrate that AD risk factors are associated with greater brain aging in women than men, although there may be more unexplored modifiable factors that influence this relationship. These findings suggest that the complex interplay between unmodifiable and modifiable AD risk factors can potentially protect against brain aging in women and men.

Indexed as

Alzheimer DiseaseApolipoprotein E4AdultAgingBrainCross-Sectional StudiesFemaleGenotypeHumansMaleRisk FactorsSex CharacteristicsApolipoprotein E4Alzheimer’s diseaseAPOEBrain agingFamily history

Identifiers

PMID33857772
PMCPMC8065341
OpenAlexW3135230407

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.