Adverse outcomes and mortality in users of non-steroidal anti-inflammatory drugs who tested positive for SARS-CoV-2: A Danish nationwide cohort study

Autoři: Lars Christian Lund aff001;  Kasper Bruun Kristensen aff001;  Mette Reilev aff001;  Steffen Christensen aff002;  Reimar Wernich Thomsen aff003;  Christian Fynbo Christiansen aff003;  Henrik Støvring aff001;  Nanna Borup Johansen aff005;  Nikolai Constantin Brun aff005;  Jesper Hallas aff001;  Anton Pottegård aff001
Působiště autorů: Clinical Pharmacology and Pharmacy, Department of Public Health, University of Southern Denmark, Odense, Denmark aff001;  Department of Anaesthesia and Intensive Care Medicine, Aarhus University Hospital, Aarhus, Denmark aff002;  Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark aff003;  Biostatistics, Department of Public Health, Aarhus University, Aarhus, Denmark aff004;  Department of Medical Evaluation and Biostatistics, Danish Medicines Agency, Copenhagen, Denmark aff005
Vyšlo v časopise: Adverse outcomes and mortality in users of non-steroidal anti-inflammatory drugs who tested positive for SARS-CoV-2: A Danish nationwide cohort study. PLoS Med 17(9): e32767. doi:10.1371/journal.pmed.1003308
Kategorie: Research Article



Concerns over the safety of non-steroidal anti-inflammatory drug (NSAID) use during severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection have been raised. We studied whether use of NSAIDs was associated with adverse outcomes and mortality during SARS-CoV-2 infection.

Methods and findings

We conducted a population-based cohort study using Danish administrative and health registries. We included individuals who tested positive for SARS-CoV-2 during the period 27 February 2020 to 29 April 2020. NSAID users (defined as individuals having filled a prescription for NSAIDs up to 30 days before the SARS-CoV-2 test) were matched to up to 4 non-users on calendar week of the test date and propensity scores based on age, sex, relevant comorbidities, and use of selected prescription drugs. The main outcome was 30-day mortality, and NSAID users were compared to non-users using risk ratios (RRs) and risk differences (RDs). Secondary outcomes included hospitalization, intensive care unit (ICU) admission, mechanical ventilation, and acute renal replacement therapy. A total of 9,236 SARS-CoV-2 PCR-positive individuals were eligible for inclusion. The median age in the study cohort was 50 years, and 58% were female. Of these, 248 (2.7%) had filled a prescription for NSAIDs, and 535 (5.8%) died within 30 days. In the matched analyses, treatment with NSAIDs was not associated with 30-day mortality (RR 1.02, 95% CI 0.57 to 1.82, p = 0.95; RD 0.1%, 95% CI −3.5% to 3.7%, p = 0.95), risk of hospitalization (RR 1.16, 95% CI 0.87 to 1.53, p = 0.31; RD 3.3%, 95% CI −3.4% to 10%, p = 0.33), ICU admission (RR 1.04, 95% CI 0.54 to 2.02, p = 0.90; RD 0.2%, 95% CI −3.0% to 3.4%, p = 0.90), mechanical ventilation (RR 1.14, 95% CI 0.56 to 2.30, p = 0.72; RD 0.5%, 95% CI −2.5% to 3.6%, p = 0.73), or renal replacement therapy (RR 0.86, 95% CI 0.24 to 3.09, p = 0.81; RD −0.2%, 95% CI −2.0% to 1.6%, p = 0.81). The main limitations of the study are possible exposure misclassification, as not all individuals who fill an NSAID prescription use the drug continuously, and possible residual confounding by indication, as NSAIDs may generally be prescribed to healthier individuals due to their side effects, but on the other hand may also be prescribed for early symptoms of severe COVID-19.


Use of NSAIDs was not associated with 30-day mortality, hospitalization, ICU admission, mechanical ventilation, or renal replacement therapy in Danish individuals who tested positive for SARS-CoV-2.

Trial registration

The European Union electronic Register of Post-Authorisation Studies EUPAS34734

Klíčová slova:

COVID 19 – Danish people – Intensive care units – Medical risk factors – NSAIDs – Renal analysis – SARS CoV 2 – Virus testing


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