Evidence map›Paper›PMID 34155229›Full record

ArticleScientific reports2021

Bleeding outcomes and factor utilization after switching to an extended half-life product for prophylaxis in haemophilia A in Austria.

Cihan Ay, Clemens Feistritzer, Joachim Rettl, Gerhard Schuster, Anna Vavrovsky, Leonard Perschy, Ingrid Pabinger

Open access · goldAbstract readMulticenter Study
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
1.3field-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

6 citing papers in PubMed, 14 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 4 institutions in 1 country.

Cihan AyClinical Division of Haematology and Haemostaseology, Department of Medicine I, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria. cihan.ay@meduniwien.ac.at.
Clemens FeistritzerDepartment of Internal Medicine V-Haematology and Oncology, Medical University Innsbruck, Innsbruck, Austria.
Joachim RettlDepartment for Internal Medicine and Haematology and Medical Oncology, Klinikum Klagenfurt a.W., Klagenfurt, Austria.
Gerhard SchusterAustrian Red Cross, Blood Transfusion Service for Upper Austria, Linz, Austria.
Anna VavrovskyAcademy for Value in Health, Vienna, Austria.
Leonard PerschyClinical Division of Haematology and Haemostaseology, Department of Medicine I, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
Ingrid PabingerClinical Division of Haematology and Haemostaseology, Department of Medicine I, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
Medical University of Vienna · ATAustrian Red Cross · ATInnsbruck Medical University · ATKlinikum Klagenfurt · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To prevent bleeding in severe haemophilia A [SHA, defined as factor VIII (FVIII) activity < 1%] regular prophylactic FVIII replacement therapy is required, and the benefits of factor products with extended half-life (EHL) over traditional standard half-life (SHL) are still being debated. We performed a multi-centre, retrospective cohort study of persons with SHA in Austria aiming to compare clinical outcomes and factor utilization in patients with SHA, who switched from prophylaxis with SHL to an EHL. Data were collected from haemophilia-specific patient diaries and medical records. Twenty male persons with SHA (median age: 32.5 years) were included. The most common reason for switching to the EHL was a high bleeding rate with SHL. Switch to rFVIII-Fc resulted in a significantly decreased annualized bleeding rate (ABR; median difference (IQR): - 0.3 (- 4.5-0); Wilcoxon signed-rank test for matched pairs: Z = - 2.7, p = 0.008) and number of prophylactic infusions per week (- 0.75 (- 1.0-0.0); Z = - 2.7, p = 0.007). Factor utilization was comparable to prior prophylaxis with SHL (0.0 (- 15.8-24.8) IU/kg/week; Z = - 0.4, p = 0.691). In summary, switch to EHL (rFVIII-Fc) was associated with an improved clinical outcome, reflected by ABR reduction, and less frequent infusions, without significantly higher factor usage.

Indexed as

Drug SubstitutionAdultAustriaDrug Administration ScheduleDrug CostsFactor IXHemophilia AHemorrhageHumansMaleMiddle AgedRecombinant ProteinsRetrospective StudiesTreatment OutcomeFactor IXRecombinant Proteins

Identifiers

PMID34155229
PMCPMC8217178
OpenAlexW3174783158

What OpenQuestion holds

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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.