Evidence map›Paper›PMID 31730475›Full record

SynthesisOrphanet journal of rare diseases2019

Incidence of acquired thrombotic thrombocytopenic purpura in Germany: a hospital level study.

Wolfgang Miesbach, Jan Menne, Martin Bommer, Ulf Schönermarck, Thorsten Feldkamp, Martin Nitschke, Timm H Westhoff, Felix S Seibert, Rainer Woitas, Rui Sousa and 3 more

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in Orphanet journal of rare diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.6field-weighted citation impact, top 9% 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

26 citing papers in PubMed, 44 citations in OpenAlex.

  1. Epidemiology of immune-mediated thrombotic thrombocytopenic purpura in Germany.Research and practice in thrombosis and haemostasis · 2026
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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

13 authors at 10 institutions in 2 countries.

Wolfgang MiesbachUniversitätsklinikum Frankfurt, Medizinische Klinik II / Institut für Transfusionsmedizin und Immunhämatologie, Frankfurt, Germany. wolfgang.miesbach@kgu.de.ORCID 0000-0002-4506-0061
Jan MenneMedizinische Hochschule Hannover, Klinik für Nieren- und Hochdruckerkrankungen, Hannover, Germany.
Martin BommerAlb-Fils Kliniken Göppingen, Klinik für Hämatologie, Onkologie und Infektionskrankheiten, Göppingen, Germany.
Ulf SchönermarckKlinikum der Universität München - Medizinische Klinik und Poliklinik IV, Nephrologisches Zentrum, München, Germany.
Thorsten FeldkampKlinik für Innere Medizin IV - Universitätsklinikum Schleswig Holstein, Nieren- und Hochdruckkrankheiten, Kiel, Germany.
Martin NitschkeMedizinische Klinik I - Universitätsklinikum Schleswig Holstein, Nephrologie & Transplantation, Lübeck, Germany.
Timm H WesthoffMedizinische Klinik I - Universitätsklinikum Marien Hospital Herne, Ruhr-Universität Bochum, Herne, Germany.
Felix S SeibertMedizinische Klinik I - Universitätsklinikum Marien Hospital Herne, Ruhr-Universität Bochum, Herne, Germany.
Rainer WoitasMedizinische Klinik und Poliklinik I - Universitätsklinikum Bonn, Bonn, Germany.
Rui SousaAblynx a Sanofi Company, Medical Affairs, Zwijnaarde, Belgium.
Michael WolfAblynx a Sanofi Company, Medical Affairs, Zwijnaarde, Belgium.
Stefan WalzerMArS - Market Access & Pricing Strategy GmbH, Weil am Rhein, Germany.
Björn SchwanderAHEAD GmbH, Agency for Health Economic Assessment and Dissemination, Lörrach, Germany.
Ablynx (Belgium) · BEUniversitätsklinik Marien Hospital Herne · DEAlb Fils Kliniken · DEGerman Agency for Quality in Medicine · DEGoethe University Frankfurt · DELMU Klinikum · DEMedizinische Hochschule Hannover · DEUniversity Clinic for Nephrology and Hypertension, Diabetology and Endocrinology · DEUniversity Hospital Bonn · DEUniversity Hospital Schleswig-Holstein · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAcquired thrombotic thrombocytopenic Purpura (aTTP) is a life-threatening ultra-orphan disease with a reported annual incidence between 1.5 and 6.0 cases per million in Europe and mainly affecting otherwise young and healthy adults aged 40 years on average. The goal of this study was to assess the incidence of aTTP in Germany.

methodsA systematic review was performed to determine the published evidence on the aTTP epidemiology in Germany. To obtain additional evidence on the proportion of aTTP cases within the national Thrombotic Microangiopathy (TMA) population a hospital-level study was performed, using a retrospective data collection approach. Diagnosis of aTTP was confirmed if ADAMTS13 level were < 10% and/or the medical records explicitly mentioned aTTP diagnosis. The aggregated hospital data were then projected to the national level using logistic regression techniques.

resultsThe systematic literature search did not provide incidence estimates of aTTP in Germany. Eight centers (≈27% of the top 30 TMA hospitals) delivered data according to a predefined data collection form. On average (year 2014-2016) a total number of 172 aTTP episodes per year was projected (95% confidence interval [95%CI]: 132-212). The majority were newly diagnosed aTTP cases (n = 121; 95%CI: 105-129), and 51 were recurrent aTTP cases (95%CI: 27-84). The average annual projected incidence (year 2014-2016) of aTTP episodes was 2.10 per million inhabitants in Germany (95%CI: 1.60-2.58).

conclusionsThe determined annual incidence of newly diagnosed aTTP cases and the overall annual incidence of aTTP episodes in Germany confirm the ultra-orphan character of aTTP. An external validation against international registries (France, UK and USA) shows that our findings are quite comparable with those international incidence rates.

Indexed as

AdultFemaleGermanyHospitalsHumansIncidenceLogistic ModelsMalePurpura, Thrombotic ThrombocytopenicEpidemiologyGermanyIncidenceThrombotic microangiopathyThrombotic thrombocytopenic purpura

Identifiers

PMID31730475
PMCPMC6858672
OpenAlexW2987827723

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.