Publications by authors named "Niklas D Johansen"

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High-Dose Influenza Vaccine to Reduce Hospitalizations.
Jacobo Pardo-Seco, Carmen Rodríguez-Tenreiro-Sánchez, Iago Giné-Vázquez, Narmeen Mallah, Susana Mirás-Carballal, Niklas Dyrby Johansen

N Engl J Med· December 2025

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High-Dose Influenza Vaccine Effectiveness against Hospitalization in Older Adults.
Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris, Marine Dufournet

N Engl J Med· December 2025

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High-sensitivity C-reactive protein is associated with altered cardiac structure and function in psoriasis: The PSOCADIA study.
Maria Dons, Morten Sengeløv, Kristoffer Grundtvig Skaarup, Niklas Dyrby Johansen, Mats C H Lassen

Int J Cardiol Heart Vasc· December 2025

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Evening administration of long-acting muscarinic antagonists in COPD - a randomized controlled trial.
Pradeesh Sivapalan, Valdemar Rømer, Alexander Jordan, Niklas Dyrby Johansen, Manan Pareek

BMC Pulm Med· December 2025

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High-Dose Versus Standard-Dose Influenza Vaccine in Heart Failure: A Prespecified Analysis of the DANFLU-2 Trial.
Kristoffer Grundtvig Skaarup, Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris

Circ Heart Fail· November 2025

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High-dose vs. standard-dose inactivated influenza vaccine and cardiovascular outcomes in persons with or without pre-existing atherosclerotic cardiovascular disease: the DANFLU-2 trial.
Manan Pareek, Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris

Eur Heart J· November 2025

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Effectiveness of bivalent respiratory syncytial virus prefusion F protein-based vaccine in individuals with or without atherosclerotic cardiovascular disease: the DAN-RSV trial.
Manan Pareek, Mats C Højbjerg Lassen, Niklas Dyrby Johansen, Sine H Christensen, Negar Aliabadi

Eur Heart J· November 2025

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Effect of RSV Vaccine on Heart Failure Hospitalizations: A Prespecified Analysis of the DAN-RSV Trial.
Kristoffer Grundtvig Skaarup, Mats C Højbjerg Lassen, Niklas Dyrby Johansen, Sine H Christensen, Negar Aliabadi

J Am Coll Cardiol· November 2025

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High-Dose vs Standard-Dose Influenza Vaccine and Cardiovascular Outcomes in Older Adults: A Prespecified Secondary Analysis of the DANFLU-2 Randomized Clinical Trial.
Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris, Marine Dufournet

JAMA Cardiol· November 2025

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Effectiveness of high-dose influenza vaccine against hospitalisations in older adults (FLUNITY-HD): an individual-level pooled analysis.
Niklas Dyrby Johansen, Daniel Modin, Jacobo Pardo-Seco, Carmen Rodriguez-Tenreiro-Sánchez, Matthew M Loiacono

Lancet· November 2025

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Cardiac Effects of Dapagliflozin in People with Chronic Kidney Disease.
Katja Vu Bartholdy, Niklas Dyrby Johansen, Kristoffer Grundtvig Skaarup, Daniel Modin, Nino Landler

NEJM Evid· November 2025

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Effects of high-dose versus standard-dose influenza vaccine among patients with chronic lung disease: A prespecified analysis of the DANFLU-1 trial.
Lisa Steen Duus, Niklas Dyrby Johansen, Daniel Modin, Kira Hyldekær Janstrup, Joshua Nealon

Respir Investig· November 2025

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Three-dimensional left atrial strain is associated with heart failure and cardiovascular death in the general population.
Marat Yafasov, Flemming Javier Olsen, Kristoffer Grundtvig Skaarup, Mats C Højbjerg Lassen, Niklas Dyrby Johansen

Clin Res Cardiol· November 2025

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High-Dose vs. Standard-Dose Influenza Vaccine and Cardiovascular Outcomes in Older Adults: The FLUNITY-HD Prespecified Pooled Analysis.
Niklas Dyrby Johansen, Daniel Modin, Jacobo Pardo-Seco, Carmen Rodriguez-Tenreiro-Sánchez, Matthew M Loiacono

Circulation· November 2025

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Digital Nudges to Increase Influenza Vaccination in Patients with Chronic Diseases.
Niklas Dyrby Johansen, Muthiah Vaduganathan, Ankeet S Bhatt, Daniel Modin, Brian L Claggett

NEJM Evid· November 2025

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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

J Clin Hypertens (Greenwich)· November 2025

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High-Dose vs Standard-Dose Influenza Vaccine in Chronic Kidney Disease: The DANFLU-2 Trial Subgroup Analysis.
Katja Vu Bartholdy, Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris

J Am Coll Cardiol· November 2025

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High-Dose vs Standard-Dose Influenza Vaccine in Older Adults With Atrial Fibrillation: A Prespecified Analysis of the DANFLU-2 Trial.
Caroline Espersen, Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris

J Am Coll Cardiol· November 2025

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Bivalent RSV Prefusion F Protein-Based Vaccine for Preventing Cardiovascular Hospitalizations in Older Adults: A Prespecified Analysis of the DAN-RSV Trial.
Mats C Højbjerg Lassen, Niklas Dyrby Johansen, Sine H Christensen, Negar Aliabadi, Kristoffer G Skaarup

JAMA· October 2025

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Trials on Timing of Cardiovascular Medication Administration: The Cardiovascular Circadian Chronotherapy Trial Concept.
Manan Pareek, Niklas Dyrby Johansen, Sine Højlund Christensen, Anna Meta Dyrvig Kristensen, Majid Afzal

JACC Adv· October 2025

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Relative vaccine effectiveness of high-dose vs. standard-dose influenza vaccine against clinical outcomes according to history of atrial fibrillation: a pre-specified analysis of the DANFLU-1 randomized trial.
Caroline Espersen, Niklas Dyrby Johansen, Daniel Modin, Kira Hyldekær Janstrup, Matthew M Loiacono

Eur Heart J Open· September 2025

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Long-term effects on cardiac function and symptoms in patients with myocarditis following COVID-19 vaccination: the ECHOVID-19 Long-term Study.
Mohammad Nizar Ramadan, Filip Soeskov Davidovski, Caroline Espersen, Ali Hikmat Al-Rubai, Ayat Khoraizat, Niklas Dyrby Johansen

Open Heart· September 2025

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Risk of Myocarditis or Pericarditis With High-Dose vs Standard-Dose Influenza Vaccine: A Prespecified Secondary Analysis of the Randomized DANFLU-2 Trial.
Manan Pareek, Niklas Dyrby Johansen, Daniel Modin, Matthew M Loiacono, Rebecca C Harris

JAMA Netw Open· August 2025

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RSV Prefusion F Vaccine for Prevention of Hospitalization in Older Adults.
Mats C Højbjerg Lassen, Niklas Dyrby Johansen, Sine H Christensen, Negar Aliabadi, Kristoffer G Skaarup

N Engl J Med· August 2025

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The silent exclusion: rethinking eligibility and generalizability in clinical trials.
Jens-Ulrik Jensen, Niklas Dyrby Johansen, Alexander G Mathioudakis, Tor Biering-Sørensen, Pradeesh Sivapalan

Lancet Reg Health West Pac· August 2025

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