Evidence map›Paper›PMID 32211576›Full record

ArticleResearch and practice in thrombosis and haemostasis2020

Hematocrit and incidence of venous thromboembolism.

Aaron R Folsom, Wendy Wang, Romil Parikh, Pamela L Lutsey, Joan D Beckman, Mary Cushman, Atherosclerosis Risk in Communities (ARIC) Study Investigators

Open access · goldAbstract read
In one paragraph

Article in Research and practice in thrombosis and haemostasis, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.2field-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

25 citing papers in PubMed, 39 citations in OpenAlex.

  1. Efficacy of Atorvastatin Against Venous Thromboembolism After Total Hip Arthroplasty.Journal of musculoskeletal & neuronal interactions · 2025
    Trial
  2. Article
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  4. Review
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  6. Article
  7. Refractory Post-transplant Erythrocytosis in a Renal Transplant Recipient: A Case Report.Journal of community hospital internal medicine perspectives · 2026
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Article
  14. Observational
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Observational
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

7 authors at 2 institutions in 1 country.

Aaron R FolsomDivision of Epidemiology & Community Health School of Public Health University of Minnesota Minneapolis MN USA.ORCID https://orcid.org/0000-0003-2635-2699
Wendy WangDivision of Epidemiology & Community Health School of Public Health University of Minnesota Minneapolis MN USA.
Romil ParikhDivision of Epidemiology & Community Health School of Public Health University of Minnesota Minneapolis MN USA.
Pamela L LutseyDivision of Epidemiology & Community Health School of Public Health University of Minnesota Minneapolis MN USA.ORCID https://orcid.org/0000-0002-1572-1340
Joan D BeckmanDivision of Hematology, Oncology and Transplantation Department of Medicine University of Minnesota Minneapolis MN USA.
Mary CushmanDepartment of Medicine Larner College of Medicine at the University of Vermont Burlington VT USA.ORCID https://orcid.org/0000-0002-7871-6143
Atherosclerosis Risk in Communities (ARIC) Study Investigators
University of Minnesota · USUniversity of Vermont · US

Funding

Epidemiology of Venous Thrombosis & Pulmonary EmbolismR01HL059367 · NHLBI · UNIVERSITY OF MINNESOTA TWIN CITIES · PI TANG, WEIHONG · 1998 to 2024
$11.8M
NHLBI NIH HHS R01 HL059367
6 · The paper itself

Abstract

backgroundPatients with polycythemia vera with high hematocrit have increased risk of venous thromboembolism (VTE).

objectiveTo determine whether high hematocrit in the general population is also associated with elevated VTE risk.

methodsThe prospective Atherosclerosis Risk in Communities Study performed a complete blood count in 13 891 adults aged 45 to 64 in 1987 to 1989. We identified incident hospitalized VTEs through 2015 and performed proportional hazards regression analyses using race-sex-specific categorization of hematocrit percentiles (ie, <5th, 5th to <25th, 25th to <75th, 75th to <95th, and 95th-100th percentiles, with the 25th to <75th percentile serving as the reference).

resultsOver a median follow-up of 26 years, 800 participants had an incident venous thrombosis of the leg and/or a pulmonary embolism. There was a nonlinear association of hematocrit with VTE incidence, with risk elevated 72% for participants above the 95th percentile of hematocrit compared with the reference. Specifically, hazard ratios (95% confidence intervals) of incident VTE were 1.27 (0.91-1.76), 1.06 (0.87-1.28), 1 (reference), 1.17 (0.98-1.40) and 1.72 (1.30-2.27) across the 5 hematocrit percentiles, adjusted for age, race, sex, body mass index, smoking status and pack-years, and other confounding variables. The association of high hematocrit with VTE was limited to provoked VTE, with little evidence for unprovoked VTE. Hemoglobin above the 95th percentile also was associated with an increased risk of VTE. In contrast, there were no significant associations of platelet, leukocyte, neutrophil, or lymphocyte counts with VTE incidence.

conclusionHigh hematocrit and hemoglobin in a general middle-aged population sample were associated with increased long-term risk of VTE, particularly provoked VTE.

Indexed as

hematocrithemoglobinprospective studiespulmonary embolismvenous thrombosis

Identifiers

PMID32211576
PMCPMC7086464
OpenAlexW3012159747

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.