Evidence map›Paper›PMID 24120951›Full record

SynthesisParkinsonism & related disorders2014

Dietary fat intake, pesticide use, and Parkinson's disease.

Freya Kamel, Samuel M Goldman, David M Umbach, Honglei Chen, Gina Richardson, Marie Richards Barber, Cheryl Meng, Connie Marras, Monica Korell, Meike Kasten and 9 more

Open access · greenAbstract readMeta-Analysis
In one paragraph

Synthesis in Parkinsonism & related disorders, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed, 1 pooled it
6.9field-weighted citation impact, top 3% 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

64 citing papers in PubMed, 1 synthesis or guideline pooled it, 127 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. The Emerging Parkinson's Disease Oxylipin-Ome.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  5. Dual-Risk axis:Journal of Parkinson's disease · 2026
    Article
  6. Review
  7. Review
  8. Review
  9. Parkinson disease is a fatty acidopathy.Nature reviews. Neurology · 2025
    Review
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Review

4 more citing papers are in PubMed but not listed here.

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

19 authors at 9 institutions in 4 countries.

Freya KamelEpidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, NC, USA. Electronic address: kamel@niehs.nih.gov.
Samuel M GoldmanThe Parkinson's Institute, Sunnyvale, CA, USA.
David M UmbachBiostatistics Branch, National Institute of Environmental Health Sciences, NIH, DHHS, Research Triangle Park, NC, USA.
Honglei ChenEpidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, NC, USA.
Gina RichardsonEpidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, NC, USA.
Marie Richards BarberWestat Inc, Durham, NC, USA.
Cheryl MengThe Parkinson's Institute, Sunnyvale, CA, USA.
Connie MarrasToronto Western Hospital, University of Toronto, Toronto, Ontario, Canada.
Monica KorellThe Parkinson's Institute, Sunnyvale, CA, USA.
Meike KastenDepartment of Neurology, University of Lübeck, Lübeck, Germany; Department of Clinical and Molecular Neurogenetics, University of Lübeck, Lübeck, Germany.
Jane A HoppinEpidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, NC, USA.
Kathleen ComynsThe Parkinson's Institute, Sunnyvale, CA, USA.
Anabel ChadeInstitute of Cognitive Neurology, Institute of Neuroscience, Favaloro University, Buenos Aires, Argentina.
Aaron BlairOccupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD, USA.
Grace S BhudhikanokThe Parkinson's Institute, Sunnyvale, CA, USA.
G Webster RossVeterans Affairs Pacific Islands Health Care System, Honolulu, HI, USA.
J William LangstonThe Parkinson's Institute, Sunnyvale, CA, USA.
Dale P SandlerEpidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, NC, USA.
Caroline M TannerThe Parkinson's Institute, Sunnyvale, CA, USA.
Parkinson's Institute and Clinical Center · USNational Institute of Environmental Health Sciences · USNational Institutes of Health · USDivision of Cancer Epidemiology and GeneticsFavaloro University · ARToronto Western Hospital · CAUniversity of Lübeck · DEVA Pacific Islands Health Care System · USWestat (United States) · US

Funding

Health Effects Of Exposures In AgricultureZIAES049030 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2025
$11.2M
Prospective studies on Parkinson's diseaseZIAES101986 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI CHEN, HONGLEI · 2009 to 2016
$7.9M
STUDIES OF OCCUPATIONAL CANCER--PESTICIDESZ01CP010119 · NCI · DIVISION OF CANCER EPIDEMIOLOGY AND GENETICS · PI ALAVANJA, MICHAEL · 1996 to 2008
$5.0M
PESTICIDES AND RISK IN THE AGRICUTURAL HEALTH STUDYR01ES010803 · NIEHS · PARKINSON'S INSTITUTE · PI TANNER, CAROLINE M. · 2000 to 2004
$3.7M
Statistical Methods In Human Development/clinical StudiesZIAES049004 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI UMBACH, DAVID M · 2009 to 2025
$1.8M
Pesticides And Parkinson s Disease In The Agricultural Health StudyZIAES044007 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2017
$1.3M
HEALTH EFFECTS OF EXPOSURES IN AGRICULTUREZ01ES049030 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 1997 to 2008
$889k
Pesticides And Parkinson s Disease In The Agricultural Health StudyZ01ES044007 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2001 to 2008
$298k
Intramural NIH HHS Z01 CP010119Intramural NIH HHS Z01 ES044007Intramural NIH HHS Z01 ES049030Intramural NIH HHS ZIA ES044007NCI NIH HHS Z01-CP010119NIEHS NIH HHS R01 ES010803NIEHS NIH HHS R01-ES10803
6 · The paper itself

Abstract

backgroundDietary fat intake may modify Parkinson's disease (PD) risk directly or by altering the response to environmental neurotoxicants including pesticides.

methodsWe conducted a case-control study of PD nested in the Agricultural Health Study (AHS), a cohort of pesticide applicators and spouses. We evaluated diet and pesticide use before diagnosis in 89 PD cases, confirmed by movement disorder specialists, or a corresponding date in 336 frequency-matched controls. Associations were evaluated using multivariate logistic regression to estimate odds ratios (ORs) and 95% confidence intervals (CIs).

resultsIn the AHS, PD was inversely associated with N-3 polyunsaturated fatty acids (PUFAs) (OR 0.4, 95% CI 0.2-0.8 for highest vs. lowest tertile) and the N-3 precursor α-linolenic acid (0.4, 0.2-0.8). In a meta-analysis of nine studies, including the present one, PD was inversely associated with α-linolenic acid (0.81, 0.68-0.96). In the AHS, associations of PD with the pesticides paraquat and rotenone were modified by fat intake. The OR for paraquat was 4.2 (1.5-12) in individuals with PUFA intake below the median but 1.2 (0.4-3.4) in those with higher intake (p-interaction = 0.10). The OR for rotenone was 5.8 (2.3-15) in those with saturated fat intake above the median but 1.5 (0.5-4.2) in those with lower intake (p-interaction = 0.02).

conclusionsPUFA intake was consistently associated with lower PD risk, and dietary fats modified the association of PD risk with pesticide exposure. If confirmed, these findings suggest that a diet high in PUFAs and low in saturated fats might reduce risk of PD.

Indexed as

DietDietary FatsFatty Acids, Omega-3AdultAgedAged, 80 and overCase-Control StudiesFemaleHumansMaleMiddle AgedParkinson DiseasePesticidesRisk FactorsDietary FatsFatty Acids, Omega-3PesticidesDietary fatParkinson's diseasePesticidesPolyunsaturated fatty acids

Identifiers

PMID24120951
PMCPMC3936597
OpenAlexW2058530978

What OpenQuestion holds

Textmetadata
LicenceTDM
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.