Evidence map›Paper›PMID 18949038›Full record

ArticlePloS one2008

Genome-wide analysis of single nucleotide polymorphisms uncovers population structure in Northern Europe.

Elina Salmela, Tuuli Lappalainen, Ingegerd Fransson, Peter M Andersen, Karin Dahlman-Wright, Andreas Fiebig, Pertti Sistonen, Marja-Liisa Savontaus, Stefan Schreiber, Juha Kere and 1 more

Abstract readComparative Study
In one paragraph

Article in PloS one, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 1 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

68 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
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  11. Decoding Genetics, Ancestry, and Geospatial Context for Precision Health.medRxiv : the preprint server for health sciences · 2023
    Article
  12. Review
  13. The genetic structure of Norway.European journal of human genetics : EJHG · 2021
    Article
  14. Article
  15. Article
  16. Article
  17. Forensic psychiatry in Finland: an overview of past, present and future.International journal of mental health systems · 2020
    Review
  18. Article
  19. Article
  20. Article

8 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

11 authors.

Elina SalmelaDepartment of Medical Genetics, University of Helsinki, Helsinki, Finland.
Tuuli Lappalainen
Ingegerd Fransson
Peter M Andersen
Karin Dahlman-Wright
Andreas Fiebig
Pertti Sistonen
Marja-Liisa Savontaus
Stefan Schreiber
Juha Kere
Päivi Lahermo

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundGenome-wide data provide a powerful tool for inferring patterns of genetic variation and structure of human populations. PRINCIPAL

findingsIn this study, we analysed almost 250,000 SNPs from a total of 945 samples from Eastern and Western Finland, Sweden, Northern Germany and Great Britain complemented with HapMap data. Small but statistically significant differences were observed between the European populations (F(ST) = 0.0040, p<10(-4)), also between Eastern and Western Finland (F(ST) = 0.0032, p<10(-3)). The latter indicated the existence of a relatively strong autosomal substructure within the country, similar to that observed earlier with smaller numbers of markers. The Germans and British were less differentiated than the Swedes, Western Finns and especially the Eastern Finns who also showed other signs of genetic drift. This is likely caused by the later founding of the northern populations, together with subsequent founder and bottleneck effects, and a smaller population size. Furthermore, our data suggest a small eastern contribution among the Finns, consistent with the historical and linguistic background of the population. SIGNIFICANCE: Our results warn against a priori assumptions of homogeneity among Finns and other seemingly isolated populations. Thus, in association studies in such populations, additional caution for population structure may be necessary. Our results illustrate that population history is often important for patterns of genetic variation, and that the analysis of hundreds of thousands of SNPs provides high resolution also for population genetics.

Indexed as

Genome-Wide Association StudyPolymorphism, Single NucleotideCohort StudiesEuropeFinlandGene FrequencyGenetic MarkersHumansLanguageMalePopulationGenetic Markers

Identifiers

PMID18949038
PMCPMC2567036

What OpenQuestion holds

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Registered trials

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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.