Evidence map›Paper›PMID 34771542›Full record

ArticleCancers2021

Significant Inter- and Intralaboratory Variation in Gleason Grading of Prostate Cancer: A Nationwide Study of 35,258 Patients in The Netherlands.

Rachel N Flach, Peter-Paul M Willemse, Britt B M Suelmann, Ivette A G Deckers, Trudy N Jonges, Carmen van Dooijeweert, Paul J van Diest, Richard P Meijer

Abstract read
In one paragraph

Article in Cancers, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–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

19 citing papers in PubMed.

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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

8 authors.

Rachel N FlachDepartment of Oncological Urology, Cancer Center, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.ORCID 0000-0002-4448-2895
Peter-Paul M WillemseDepartment of Oncological Urology, Cancer Center, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.ORCID 0000-0002-6364-9224
Britt B M SuelmannDepartment of Medical Oncology, Cancer Center, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.ORCID 0000-0002-7155-3337
Ivette A G DeckersThe Nationwide Network and Registry of Histo- and Cytopathology in The Netherlands (Foundation PALGA), 3991 Houten, The Netherlands.
Trudy N JongesDepartment of Pathology, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.
Carmen van DooijeweertDepartment of Pathology, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.ORCID 0000-0001-8030-4335
Paul J van DiestDepartment of Pathology, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.
Richard P MeijerDepartment of Oncological Urology, Cancer Center, University Medical Centre Utrecht, 3508 Utrecht, The Netherlands.ORCID 0000-0003-2510-7982

Funding

Astellas Pharma (Netherlands)PfizerQuality Foundation of the Dutch Association of Medical Specialists (SKMS)
6 · The paper itself

Abstract

purposeOur aim was to analyze grading variation between pathology laboratories and between pathologists within individual laboratories using nationwide real-life data.

methodsWe retrieved synoptic (

resultsA total of 38,321 reports of 35,258 patients were included. Grade 1 ranged between 19.7% and 44.3% per laboratory (national mean = 34.1%). Out of 40 laboratories, 22 (55%) reported a significantly deviant OR, ranging from 0.48 (95% confidence interval (CI) 0.39-0.59) to 1.54 (CI 1.22-1.93). Case-mix correction was performed for 10,294 reports, altering the status of 3/21 (14%) laboratories, but increasing the observed variation (20.8% vs. 17.7%). Within 15/21 (71%) of laboratories, significant inter-pathologist variation existed.

conclusionSubstantial variation in prostate cancer grading was observed between and within Dutch pathology laboratories. Case-mix correction did not explain the variation. Better standardization of prostate cancer grading is warranted to optimize and harmonize treatment.

Indexed as

Gleason gradinginterlaboratory variationpathologyprostate cancer

Identifiers

PMID34771542
PMCPMC8582481

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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.