Evidence map›Paper›PMID 32929506›Full record

SynthesisLaboratory medicine2021

Thrombocytopenia Is Associated with COVID-19 Severity and Outcome: An Updated Meta-Analysis of 5637 Patients with Multiple Outcomes.

Xiaolong Zong, Yajun Gu, Hongjian Yu, Zhenyu Li, Yuliang Wang

Open access · bronzeAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in Laboratory medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
6.8field-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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it, 71 citations in OpenAlex.

  1. Pentoxifylline in COVID-19 and considerations for its research in long COVID.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2024
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  4. Aryl hydrocarbon receptor activation alters emergency hematopoiesis during influenza A virus infection.Toxicological sciences : an official journal of the Society of Toxicology · 2026
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  12. Prediction model to identify infectious COVID-19 patients in the emergency department.Antimicrobial stewardship & healthcare epidemiology : ASHE · 2024
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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

5 authors at 4 institutions in 1 country.

Xiaolong ZongDepartment of Laboratory, The Second Hospital of Tianjin Medical University, Tianjin, China.
Yajun GuSchool of Medical Laboratory, Tianjin Medical University, Tianjin, China.
Hongjian YuDepartment of Laboratory, Jinnan Hospital, Tianjin, China.
Zhenyu LiTianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Tianjin, China.
Yuliang WangDepartment of Laboratory, The Second Hospital of Tianjin Medical University, Tianjin, China.
Tianjin University · CNSecond Hospital of Tianjin Medical University · CNTianjin Hospital · CNTianjin Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The COVID-19 pandemic is persistent worldwide. A prior meta-analysis suggested the association of thrombocytopenia (TCP) with more severe COVID-19 illness and high mortality. Considering newly published studies, we updated the previous meta-analysis to confirm and explain the association of TCP with COVID-19 severity and multiple outcomes. Twenty-four studies with 5637 patients with COVID-19 were included in this study. The weighted incidence of TCP in COVID-19 was 12.4% (95% confidence interval [CI], 7.9%-17.7%). Data synthesis showed that the platelet number was lower in patients with either more severe illness or poor outcomes and even lower in nonsurvivors, with weighted mean differences of -24.56 × 109/L, -22.48 × 109/L, and -49.02 × 109/L, respectively. The meta-analysis of binary outcomes (with and without TCP) indicated the association between TCP and 3-fold enhanced risk of a composite outcome of intensive care unit admission, progression to acute respiratory distress syndrome, and mortality (odds ratio [OR], 3.49; 95% CI, 1.57-7.78). Subgroup analysis by endpoint events suggested TCP to be significantly associated with mortality (OR, 7.37; 95% CI, 2.08-26.14). Overall, the present comprehensive meta-analysis indicated that approximately 12% of hospitalized patients with COVID-19 have TCP, which also represents a sign of more severe illness and poor outcomes.

Indexed as

Blood PlateletsCOVID-19Disease ProgressionHospitalizationHumansIntensive Care UnitsPlatelet CountPrognosisRespiratory Distress SyndromeSARS-CoV-2Severity of Illness IndexSurvival AnalysisThrombocytopeniacoronavirus disease 2019COVID-19plateletprognosisSARS-CoV-2thrombocytopenia

Identifiers

PMID32929506
PMCPMC7543465
OpenAlexW3085027317

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.