Evidence map›Paper›PMID 26725141›Full record

ArticleParkinsonism & related disorders2016

Head injury at early ages is associated with risk of Parkinson's disease.

Kathryn M Taylor, Marie-Helene Saint-Hilaire, Lewis Sudarsky, David K Simon, Bonnie Hersh, David Sparrow, Howard Hu, Marc G Weisskopf

Abstract read
In one paragraph

Article in Parkinsonism & related disorders, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 3 pooled it
3.3field-weighted citation impact, top 8% 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

36 citing papers in PubMed, 3 syntheses or guidelines pooled it, 56 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Review
  5. Lifestyle medicine in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2026
    Review
  6. Observational
  7. Review
  8. Article
  9. Update: Protective and risk factors for Parkinson disease.Parkinsonism & related disorders · 2024
    Review
  10. Review
  11. Article
  12. Article
  13. Lifelong Association of Disorders Related to Military Trauma with Subsequent Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2023
    Article
  14. Review
  15. Peripherally-induced Movement Disorders: An Update.Tremor and other hyperkinetic movements (New York, N.Y.) · 2023
    Review
  16. Article
  17. Disorders of Movement due to Acquired and Traumatic Brain Injury.Current physical medicine and rehabilitation reports · 2022
    Review
  18. Article
  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

8 authors at 7 institutions in 2 countries.

Kathryn M TaylorHarvard T.H. Chan School of Public Health, Dept of Environmental Health, 401 Park Dr., Landmark Building, 3rd Floor, Boston MA 02215, USA. Electronic address: kmt691@mail.harvard.edu.
Marie-Helene Saint-HilaireDepartment of Neurology, Boston University Medical Center, 72 East Concord Street, C3, Boston, MA 02118, USA. Electronic address: neuromsh@bu.edu.
Lewis SudarskyDepartment of Neurology, Brigham and Women's Hospital, 75 Francis Street, Boston, MA 02115, USA. Electronic address: lsudarsky@partners.com.
David K SimonBeth Israel Deaconess Medical Center and Harvard Medical School, Department of Neurology 330 Brookline Avenue, Boston, MA 02215, USA. Electronic address: dsimon1@bidmc.harvard.edu.
Bonnie HershHarvard Vanguard Medical Associates, 133 Brookline Avenue, Boston, MA 02215, USA. Electronic address: bonnie_hersh@vmed.org.
David SparrowVA Boston Healthcare System, Jamaica Plain, 150 South Huntington Avenue, Boston, MA 02130, USA; Boston University Schools of Public Health and Medicine, 715 Albany Street, Boston, MA 02118, USA. Electronic address: david.sparrow@va.gov.
Howard HuDepartments of Epidemiology, Global Health, and Environmental Health, University of Toronto Dalla Lana School of Public Health, 6th Floor, 155 College Street, Toronto, Ontario, Canada. Electronic address: howard.hu@utoronto.ca.
Marc G WeisskopfDepartment of Epidemiology and Environmental Health, Harvard TH Chan School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA. Electronic address: mweissko@hsph.harvard.edu.
Harvard University · USBeth Israel Deaconess Medical Center · USBoston University · USBrigham and Women's Hospital · USHarvard Vanguard Medical Associates · USPublic Health Ontario · CAVA Boston Healthcare System · US

Funding

Translational Research Support CoreP30ES000002 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI SUSAN A KORRICK · 1985 to 2026
$44.6M
The HSPH Education and Research Center of Occupational Safety and HealthT42OH008416 · OH · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI CHRISTIANI, DAVID C · 2005 to 2025
$30.5M
PUBLIC HEALTH TRAINING FOR UNDERREPRESENTED MINORITIESR25GM055353 · NIGMS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI KAWACHI, ICHIRO · 1998 to 2013
$6.8M
GENE-METAL INTERACTIONS AND PARKINSON'S DISEASER01ES010798 · NIEHS · BRIGHAM AND WOMEN'S HOSPITAL · PI HU, HOWARD · 2002 to 2006
$3.0M
NIEHS NIH HHS P01-ES000002NIEHS NIH HHS P30 ES000002NIEHS NIH HHS R01 ES010798NIEHS NIH HHS R01-ES010798NIGMS NIH HHS R25 GM055353NIOSH CDC HHS T42 OH008416
6 · The paper itself

Abstract

introductionThe literature on the effect of head injuries on the risk of PD is inconclusive. Some researchers have hypothesized that studies that have seen an effect are simply capturing injury related to pre-clinical PD. However in animal models brain inflammation, which can be initiated by head trauma, has been shown to produce PD-like effects. Furthermore, animal studies have found that early life inflammation in particular is of relevance for PD pathology.

methodsWe conducted an unmatched case-control study of 379 neurologist confirmed PD patients and 230 controls from the greater Boston, Massachusetts area with questionnaire data on history of head injury and other covariates. We used multivariable logistic regression to estimate adjusted odds ratios (OR) and their corresponding 95% confidence intervals (CI) for PD.

resultsWhen we excluded injuries that occurred less than 10 years prior to the diagnosis of PD (in order to avoid reverse causation), we found an increased risk of PD associated with a head injury that resulted in a loss of consciousness, but it did not reach statistical significance (OR = 1.57; 95% CI = 0.89-2.80). We found a significant (p = 0.04) effect of age at first head injury. For every 5 year earlier age at first head injury with loss of consciousness the OR for PD was 1.37 (95% CI: 1.01-1.86).

conclusionOur results suggest that head injury in early life increases the risk of PD.

Indexed as

AdolescentAgedCase-Control StudiesChildCraniocerebral TraumaFemaleHumansMaleMiddle AgedOdds RatioParkinson DiseaseRisk FactorsSurveys and QuestionnairesHead injuryParkinson's diseaseTraumatic brain injury

Identifiers

PMID26725141
PMCPMC4787263
OpenAlexW2218428351

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.