Evidence map›Paper›PMID 34776419›Full record

ArticleJournal of Parkinson's disease2022

Insights on Genetic and Environmental Factors in Parkinson's Disease from a Regional Swedish Case-Control Cohort.

Kajsa Brolin, Sara Bandres-Ciga, Cornelis Blauwendraat, Håkan Widner, Per Odin, Oskar Hansson, Andreas Puschmann, Maria Swanberg

Open access · hybridAbstract read
In one paragraph

Article in Journal of Parkinson's disease, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 23% 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Neuroprotection in Parkinson Disease.Neurology and therapy · 2025
    Review
  5. ThemedRxiv : the preprint server for health sciences · 2025
    Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. IsmedRxiv : the preprint server for health sciences · 2024
    Article
  11. Article
  12. 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 3 institutions in 2 countries.

Kajsa BrolinLund University, Translational Neurogenetics Unit, Department of Experimental Medical Science, Lund, Sweden.
Sara Bandres-CigaLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
Cornelis BlauwendraatLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
Håkan WidnerLund University, Department of Clinical Sciences Lund, Neurology, Sweden.
Per OdinLund University, Department of Clinical Sciences Lund, Neurology, Sweden.
Oskar HanssonDepartment of Clinical Sciences Malmö, Clinical Memory Research Unit, Lund University, Sweden.
Andreas PuschmannLund University, Department of Clinical Sciences Lund, Neurology, Sweden.
Maria SwanbergLund University, Translational Neurogenetics Unit, Department of Experimental Medical Science, Lund, Sweden.
Lund University · SESkåne University Hospital · SENational Institutes of Health · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRisk factors for Parkinson's disease (PD) can be more or less relevant to a population due to population-specific genetic architecture, local lifestyle habits, and environmental exposures. Therefore, it is essential to study PD at a local, regional, and continental scale in order to increase the knowledge on disease etiology.

objectiveWe aimed to investigate the contribution of genetic and environmental factors to PD in a new Swedish case-control cohort.

methodsPD patients (n = 929) and matched population-based controls (n = 935) from the southernmost county in Sweden were included in the cohort. Information on environmental exposures was obtained using questionnaires at inclusion. Genetic analyses included a genome-wide association study (GWAS), haplotype assessment, and a risk profile analysis using cumulative genetic risk scores.

resultsThe cohort is a representative PD case-control cohort (64% men, mean age at diagnosis = 67 years, median Hoehn and Yahr score 2.0), in which previously reported associations between PD and environmental factors, such as tobacco, could be confirmed. We describe the first GWAS of PD solely composed of PD patients from Sweden, and confirm associations to well-established risk alleles in SNCA. In addition, we nominate an unconfirmed and potentially population-specific genome-wide significant association in the PLPP4 locus (rs12771445).

conclusionThis work provides an in-depth description of a new PD case-control cohort from southern Sweden, giving insights into environmental and genetic risk factors for PD in the Swedish population.

Indexed as

Genome-Wide Association StudyParkinson DiseaseCase-Control StudiesCohort StudiesFemaleGenetic Predisposition to DiseaseHumansMalePolymorphism, Single NucleotideRisk FactorsSwedencase-control studiesgenome-wide association studyhaplotypesParkinson’s diseaserisk factorsSweden

Identifiers

PMID34776419
PMCPMC8842752
OpenAlexW3211618041

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.