Evidence map›Paper›PMID 30870494›Full record

ArticlePloS one2019

Mean platelet volume is more important than age for defining reference intervals of platelet counts.

Till Ittermann, Martin A Feig, Astrid Petersmann, Dörte Radke, Andreas Greinacher, Henry Völzke, Thomas Thiele

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.2field-weighted citation impact, top 19% 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, 28 citations in OpenAlex.

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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

7 authors at 1 institution in 1 country.

Till IttermannInstitute for Community Medicine, University Medicine Greifswald, Greifswald, Germany.ORCID 0000-0002-0154-7353
Martin A FeigInstitute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany.
Astrid PetersmannInstitute for Clinical Chemistry and Laboratory Medicine; University Medicine Greifswald, Greifswald, Germany.
Dörte RadkeInstitute for Community Medicine, University Medicine Greifswald, Greifswald, Germany.
Andreas GreinacherInstitute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany.
Henry VölzkeInstitute for Community Medicine, University Medicine Greifswald, Greifswald, Germany.
Thomas ThieleInstitute for Immunology and Transfusion Medicine, University Medicine Greifswald, Greifswald, Germany.
Universitätsmedizin Greifswald · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPlatelet count is known to be associated with sex, age and mean platelet volume (MPV). Sex and age were proposed for adjustment of platelet count reference intervals, but MPV is currently not used for further adjustment. We investigated the association of MPV, age and sex with platelet counts and established individualized reference ranges respecting MPV.

methodsThe association of platelet count with age, sex and MPV was assessed in healthy participants (n = 3,033 individuals; 1,542 women) in the cross-sectional population-based cohort Study of Health in Pomerania. Reference intervals respecting age, sex, and MPV were estimated using quantile regressions for the 2.5th and 97.5th percentile.

resultsWomen had higher platelet counts than men (239 vs. 207 x109/L, p<0.001). Platelet counts correlated with age (p<0.001) and MPV (p<0.001). Quantile regression of lower and upper platelet count limits correlated less with age in female (p = 0.047 for 2.5th percentile; p = 0.906 for 97.5th percentile) and male subjects (p = 0.029 for 2.5th percentile; p = 0.195 for 97.5th percentile) compared to MPV (p<0.001 for upper and lower limit for both sexes). After adjustment for MPV, age did no longer correlate with the 2.5th (p = 0.165) or 97.5th percentile (p = 0.999) of platelet count. In contrast, after adjustment for age, MPV levels still significantly correlated with 2.5th, 50th and 97.5th percentile (p<0.001).

conclusionMPV and sex have a stronger association with platelet count than age. MPV should be considered to adjust platelet count reference intervals and needs to be respected as confounder for platelet counts in epidemiological studies and clinical practice.

Indexed as

Age FactorsMean Platelet VolumePlatelet CountAdolescentAdultAgedAged, 80 and overBlood PlateletsCohort StudiesCross-Sectional StudiesFemaleGermanyHematologyHumansMaleMiddle Aged

Identifiers

PMID30870494
PMCPMC6417788
OpenAlexW2920938170

What OpenQuestion holds

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LicenceCC BY
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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.