Evidence map›Paper›PMID 41238377›Full record

Trial reportJournal of clinical hypertension (Greenwich, Conn.)2025

High-Dose vs. Standard-Dose Influenza Vaccine in Older Patients With Hypertension: A Post Hoc Analysis of DANFLU-1.

Adam Femerling Langhoff, Niklas Dyrby Johansen, Daniel Modin, Kira Hyldekær Janstrup, Katja Vu Bartholdy, Caroline Espersen, Joshua Nealon, Sandrine Samson, Matthew M Loiacono, Rebecca Harris and 11 more

Abstract readRandomized Controlled TrialPragmatic Clinical Trial
In one paragraph

Trial report in Journal of clinical hypertension (Greenwich, Conn.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. Trial
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

21 authors.

Adam Femerling LanghoffDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.ORCID 0000-0002-6073-2938
Niklas Dyrby JohansenDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Daniel ModinDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Kira Hyldekær JanstrupDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Katja Vu BartholdyDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Caroline EspersenDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Joshua NealonSanofi, Lyon, France.
Sandrine SamsonSanofi, Lyon, France.
Matthew M LoiaconoSanofi, Swiftwater, Pennsylvania, USA.
Rebecca HarrisSanofi, Singapore, Singapore.
Carsten Schade LarsenDepartment of Clinical Medicine - Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark.
Anne Marie Reimer JensenDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Nino Emanuel LandlerDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Brian L ClaggettCardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Scott D SolomonCardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Martin J LandrayClinical Trial Service Unit and Epidemiological Studies Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK.
Gunnar H GislasonDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.
Lars KøberDepartment of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Pradeesh SivapalanDepartment of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Jens Ulrik Stæhr JensenDepartment of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Tor Biering-SørensenDepartment of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Copenhagen, Denmark.

Funding

Supported by Sanofi, which provided the HD-IIV doses along with a financial contribution covering remaining expenses. The protocol was codeveloped with the funder.
6 · The paper itself

Abstract

Patients with hypertension (HTN) face an increased risk of complications and mortality from influenza; a risk that may be modified by influenza vaccination. There is limited evidence on the effectiveness of high-dose (HD-IIV) compared with standard-dose (SD-IIV) inactivated influenza vaccines in hypertensive individuals. This study, a post hoc analysis of DANFLU-1, a pragmatic, and open-label, individually randomized trial of HD-IIV vs. SD-IIV conducted during the 2021-2022 influenza season among participants aged 65-79 years. Prespecified outcomes in DANFLU-1 included hospitalization for influenza or pneumonia, cardiovascular, cardiorespiratory, and respiratory hospitalizations, all-cause hospitalization, and all-cause mortality. Outcomes were analyzed as both time-to-first and recurrent events. DANFLU-1 randomized 12 477 participants randomized to HD-IIV or SD-IIV, of these 6469 (51.9%) had a history of HTN. HD-IIV was associated with lower hazards for hospitalizations for pneumonia or influenza, respiratory disease, and all-cause mortality compared with SD-IIV and these associations were consistent regardless of HTN status (p

Indexed as

HypertensionInfluenza, HumanInfluenza VaccinesAgedFemaleHospitalizationHumansMalePneumoniaVaccinationInfluenza Vaccines

Identifiers

PMID41238377
PMCPMC12618134

What OpenQuestion holds

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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.