Evidence map›Paper›PMID 19496920›Full record

ArticleJournal of thrombosis and haemostasis : JTH2010

Mean platelet volume is a risk factor for venous thromboembolism: the Tromsø Study, Tromsø, Norway.

S K Braekkan, E B Mathiesen, I Njølstad, T Wilsgaard, J Størmer, J B Hansen

Abstract read
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In one paragraph

Article in Journal of thrombosis and haemostasis : JTH, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 113 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
113citing papers in PubMed, 2 pooled it
7.9field-weighted citation impact, top 2% 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

113 citing papers in PubMed, 2 syntheses or guidelines pooled it, 300 citations in OpenAlex.

  1. Pooled it
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  6. Prognostic value of inflammatory and radiologic markers in pediatric bell's palsy: a retrospective study.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2026
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  10. Increased Platelet Adhesiveness in Patients with Venous Thromboembolic Disease.TH open : companion journal to thrombosis and haemostasis · 2024
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  12. Association betweenInternational journal of molecular sciences · 2024
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53 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

S K BraekkanCenter for Atherothrombotic Research in Tromsø (CART), Institute of Clinical Medicine, University of Tromsø, Tromsø, Norway. sigrid.brakkan@uit.no
E B Mathiesen
I Njølstad
T Wilsgaard
J Størmer
J B Hansen
UiT The Arctic University of Norway · NOInstitute of Clinical Research · USUniversity Hospital of North Norway · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPlatelet size, measured as mean platelet volume (MPV), is associated with platelet reactivity. MPV is increased in acute myocardial infarction, and has been identified as an independent risk factor for future myocardial infarction and stroke.

objectivesThe purpose of the study was to determine the impact of platelet count and MPV on the incidence of venous thromboembolism (VTE) in a prospective, population-based study.

methodsPlatelet count, MPV and baseline characteristics were registered in 25 923 subjects aged 25-96 years who participated in the Tromsø Study in 1994-1995. Incident VTE events were registered to the end of follow-up (1 September 2007).

resultsThere were 445 validated incident VTE events (1.6 per 1000 person-years), of which 186 (42%) were unprovoked, during a mean of 10.8 years of follow-up. Subjects with MPV >or= 9.5 fL had a 1.3-fold [95% confidence interval (CI) 1.0-1.7] higher risk of total VTE and a 1.5-fold (95% CI 1.1-2.3) higher risk of unprovoked VTE than subjects with MPV < 8.5 fL in analyses adjusted for age, sex, smoking, body mass index, and platelet count. Increasing MPV was associated with increased risk of total VTE (P for trend = 0.09) and unprovoked VTE (P for trend = 0.03) in analyses adjusted for age and sex. There was no significant association between increasing platelet count and risk of VTE.

conclusionsAn increasing MPV was identified as a predictor for VTE, in particular VTE of unprovoked origin. The present findings support the concept that platelet reactivity is important in the pathogenesis of VTE.

Indexed as

Platelet Function TestsAdultBlood PlateletsCell SizeFemaleHumansIncidenceMaleMiddle AgedNorwayPlatelet CountPopulation SurveillancePredictive Value of TestsProportional Hazards ModelsProspective StudiesRisk Assessment

Identifiers

PMID19496920
OpenAlexW2073945333

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.