Evidence map›Paper›PMID 23609436›Full record

SynthesisMovement disorders : official journal of the Movement Disorder Society2013

Head injury and risk of Parkinson disease: a systematic review and meta-analysis.

Siavash Jafari, Mahyar Etminan, Farhad Aminzadeh, Ali Samii

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Movement disorders : official journal of the Movement Disorder Society, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 138 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
138citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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

138 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
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  3. Pooled it
  4. Pooled it
  5. Review
  6. Article
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  9. Article
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  11. Parkinson Disease and the Gut: A Primer for Gastroenterologists.The American journal of gastroenterology · 2025
    Review
  12. Article
  13. Review
  14. Article
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  16. Observational
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78 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Siavash JafariFaculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Mahyar Etminan
Farhad Aminzadeh
Ali Samii

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Head trauma has been implicated in the etiopathogenesis of Parkinson's disease (PD). We performed a meta-analysis to investigate the association between head trauma and the risk of developing PD. We included observational studies if they (1) clearly defined PD, (2) defined head trauma leading to concussion, and (3) presented odds ratios (ORs) and 95% confidence intervals (CIs) or provided data to compute these statistics. Random effect model was used to estimate the pooled, adjusted OR. Heterogeneity between studies was evaluated with the Q test and the I(2) statistic. We conducted a sensitivity analysis to assess the influence of each study and repeated the analysis by excluding the studies with the largest weights. We used funnel plot to assess the presence of publication bias. After reviewing more than 636 article titles, 34 articles were selected for full review. In total, 22 studies (19 case-control studies, 2 nested case-control studies, and 1 cohort study) were included in the meta-analysis. The pooled OR for the association of PD and head trauma was 1.57 (95% CI, 1.35-1.83). The results of our meta-analysis indicate that a history of head trauma that results in concussion is associated with a higher risk of developing PD. © 2013 Movement Disorder Society.

Indexed as

Case-Control StudiesConfidence IntervalsCraniocerebral TraumaDatabases, FactualParkinson Diseasehead injuryhead traumainflammationmeta-analysisParkinson's diseasesystematic reviewtraumatic brain injury

Identifiers

PMID23609436

What OpenQuestion holds

Textmetadata
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.