ClinicalTrials.gg
TerminatedNCT04492254ETHICUpdated May 2, 2022

Early Prophylactic Low-molecular-weight Heparin (LMWH) in Symptomatic COVID-19 Positive Patients

A Phase 3 interventional study of Enoxaparin in COVID-19, sponsored by Thrombosis Research Institute. Terminated at 3 sites in 3 countries. Open to participants aged 55 Years and older. Per ClinicalTrials.gov, last updated 2022-05-02.

Sponsored by Thrombosis Research Institute · Phase 3, Interventional, and Treatment

Why this study was terminated
Average event rate (end point) was much lower than expected. A larger sample size would have been required to maintain same statistical power, which was not achievable in a feasible time scale. No safety concerns were identified with bleeding.
Phase
Phase 3
Study type
Interventional
Enrollment
219
Allocation
Randomized
Ages
55 Years and older
Sex
All
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Study summary

Evidence has shown that COVID-19 infections can lead to an increased risk of blood clots. These blood clots can lead to individuals being admitted to hospital, or, unfortunately in severe cases, death. Enoxaparin is a blood-thinning drug which has been used by doctors and nurses in hospitals for many years to prevent the thickening of blood which may lead to a clot. It is easier for doctors to prevent new blood clots from forming than treating existing blood clots.

Currently, there are no treatments for COVID-19. There is an urgent need to find a safe and effective treatment to prevent worsening of the disease that may lead to hospital admission and/or death. The ETHIC (Early Thromboprophylaxis in COVID-19) study aims to find out if giving enoxaparin in an early stage of the COVID-19 disease can prevent individuals being admitted to hospital and/or death. The study will take place in approximately 8 to 10 countries, in approximately 30 to 50 centres.

Patients will be allowed to take part if they have had a confirmed COVID-19 infection, are ≥ 55 years of age and have at least two of the following additional risk factors; age ≥ 70 years, body mass index > 25 kg/m2, chronic obstructive pulmonary disease, diabetes, cardiovascular disease, or corticosteroid use.

Half the patients in the study will receive the blood-thinning drug enoxaparin for three weeks, and half will receive no treatment. Individuals will be randomly allocated to one of these groups. After 21 days, the number of patients in each group who were either admitted to hospital, or died, will be compared. The number of patients in each group who developed a blood clot (venous thromboembolism) will also be compared. Further comparisons will be made at both 50 and 90 days after the beginning of the study.

Read the detailed description

This is an open label randomized controlled trial of symptomatic individuals with confirmed COVID-19 in a community setting.

Justification: There is currently no standard of care treatment for Covid-19.

Upon enrolment into the study, patients will be randomised to receive either enoxaparin (40 mg once per day if \< 100 kg, 40 mg twice per day if ≥ 100 kg) or the current standard of care (no enoxaparin) for three weeks (21 days). Randomisation must occur within 5 days of the SARS-CoV-2 test. Data will be collected at baseline and 21 days, with further assessments at 50 and 90 days.

Participants randomised to enoxaparin will receive pre-loaded syringes as part of the study, and information regarding self-administration will be provided by the sponsor. Participants in the control arm of this study will receive no treatment (current standard of care).

Screening Phase:

Investigator sites will be selected to represent community care in each country (from general practice/office based care settings, testing centres and hospitals) and invited to participate. All individuals satisfying the inclusion/exclusion criteria will be considered for enrolment and their medical history checked to exclude any patients not suitable.

Participants will be provided with a patient information sheet and consent form (PISCF), either paper or an electronic version. All participants must provide informed consent by reviewing and discussing the PISCF and by completing and signing the consent form (paper version or the electronic version). Once informed consent has been obtained, data related to baseline will be collected from a review of the participants' medical records and entered into the electronic data capture system.

Treatment Phase:

Data related to clinical outcomes for both the primary outcome (composite of hospitalisation and/or death) and secondary safety outcome (major bleeding) will be measured at 21 days. This time point will be used as a marker for collection of all data from the preceding period.

Safety and Monitoring Phase:

Data related to all outcomes will be again measured at 50 days. This time point will be used as a marker for collection of all data from the preceding period to evaluate the incidence of bleeding in all participants.

End of Study and Follow-up Phase:

The outcomes of death and hospitalisation will be further recorded 90 days after randomisation. This time point will be used as a marker for collection of all information from the interim period. The end of the trial will occur immediately following the last visit/data item of the last patient undergoing the trial. The aim of data collection will be to accurately capture all planned and unplanned visits, interruptions to treatment and events.

In case no patient data have been recorded in the participant's medical records at the site during the months following the last data entry, a follow-up phone contact will be made by the site and documented to verify that all events are being captured and participants are not lost to follow up.

The schedule of assessments is as follows: Reference: Section 6.5 of the protocol. Pages 27 to 29.

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Conditions studied

  • COVID-19

Browse trials for

Keywords

  • Low Molecular Weight Heparin
  • Enoxaparin
03

In context

COVID-19

7,774 studies on the registry are indexed under COVID-19; 482 are open to participants now.

This study's enrollment of 219 is above the median of 100 across 4,175 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Thrombosis Research Institute is the lead sponsor of 5 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
55 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Signed Informed consent
  • Confirmed COVID-19 (i.e. symptoms + positive test for SARS-CoV-2)
  • Male or female, age ≥ 55 years
  • At least two of the following additional risk factors:

Age ≥ 70 years Body mass index > 25 kg/m2 Chronic obstructive pulmonary disease (COPD)* Diabetes* Cardiovascular disease* Corticosteroid use

*Defined as any disease requiring medical intervention or treatment.

Exclusion criteria

Exclusion Criteria:

  • Contraindications to unfractionated heparin or LMWH
  • Recent (\<48 hours) or planned spinal or epidural anesthesia or puncture, PCI or thrombolytic therapy within the preceding 24 hours
  • Increased risk for bleeding complications
  • Pregnant women
  • Severe renal impairment (GFR \< 30 mL/min)
  • Receiving any antiplatelet therapy (with the exception of low dose (≤100mg) aspirin) or anticoagulant therapy (e.g. VKA, DOAC)
  • Patients participating in an interventional study that is outside the purview of TRI sponsored studies.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
219 participants (actual)

Study arms

  • Experimental
    Enoxaparin

    (40 mg o/d if \< 100 kg, 40 mg b/d if ≥ 100 kg)

    Drug: Enoxaparin

  • No intervention
    Current standard of care (no enoxaparin)

    Standard of care

Interventions

  • The treatment provided will be enoxaparin sodium 40mg/0.4 mL. All doses will be provided in pre-filled, single-dose syringes for subcutaneous injection.

    Also known as: Lovenox/Clexane

06

What researchers measure

Primary outcomes

  1. Hospital Admission

    Hospital admission including: Pneumonia Acute Respiratory distress syndrome Admission to intensive care unit (ICU) Mechanical ventilation (MV)/intubation requirement Continuous positive airway pressure (CPAP)/Non-invasive ventilation Extracorporeal membrane oxygenation (ECMO)

    Time frame: 21 days

  2. Hospital Admission

    Hospital admission including: Pneumonia Acute Respiratory distress syndrome Admission to intensive care unit (ICU) Mechanical ventilation (MV)/intubation requirement Continuous positive airway pressure (CPAP)/Non-invasive ventilation Extracorporeal membrane oxygenation (ECMO)

    Time frame: 50 days

  3. Hospital Admission

    Hospital admission including: Pneumonia Acute Respiratory distress syndrome Admission to intensive care unit (ICU) Mechanical ventilation (MV)/intubation requirement Continuous positive airway pressure (CPAP)/Non-invasive ventilation Extracorporeal membrane oxygenation (ECMO)

    Time frame: 90 days

  4. Death

    All-cause Cardiovascular Non-Cardiovascular Specific causes Fatal bleed

    Time frame: 21 days

  5. Death

    All-cause Cardiovascular Non-Cardiovascular Specific causes Fatal bleed

    Time frame: 50 days

  6. Death

    All-cause Cardiovascular Non-Cardiovascular Specific causes Fatal bleed

    Time frame: 90 days

Secondary outcomes

  1. Bleeding (as defined by ISTH criteria)

    Frequency Location Treatment (transfusion and units of blood products transfused) Severity (classified as major, clinically relevant non-major and minor)

    Time frame: 21 and 50 days

  2. Diagnosis of VTE

    Deep Vein Thrombosis (DVT) or Pulmonary Embolism (PE)

    Time frame: 21, 50 and 90 days

07

Study locations

3 sites
  • Harry Gibbs, National Co-ordinating Investigator, The Alfred Hospital
    Melbourne, Australia
  • Dr Frank Cools, National Co-ordinating Investigator, AZ Klina
    Brasschaat, Belgium
  • Prof. Barry Jacobson, National Coordinating Investigator, University of the Witwatersrand
    Johannesburg, South Africa
08

References and documents

Publications

  • Tang N, Li D, Wang X, Sun Z. Abnormal coagulation parameters are associated with poor prognosis in patients with novel coronavirus pneumonia. J Thromb Haemost. 2020 Apr;18(4):844-847. doi: 10.1111/jth.14768. Epub 2020 Mar 13. PubMed 32073213 ↗
  • Spiezia L, Boscolo A, Poletto F, Cerruti L, Tiberio I, Campello E, Navalesi P, Simioni P. COVID-19-Related Severe Hypercoagulability in Patients Admitted to Intensive Care Unit for Acute Respiratory Failure. Thromb Haemost. 2020 Jun;120(6):998-1000. doi: 10.1055/s-0040-1710018. Epub 2020 Apr 21. PubMed 32316063 ↗
  • Escher R, Breakey N, Lammle B. Severe COVID-19 infection associated with endothelial activation. Thromb Res. 2020 Jun;190:62. doi: 10.1016/j.thromres.2020.04.014. Epub 2020 Apr 15. No abstract available. PubMed 32305740 ↗
  • Tang N, Bai H, Chen X, Gong J, Li D, Sun Z. Anticoagulant treatment is associated with decreased mortality in severe coronavirus disease 2019 patients with coagulopathy. J Thromb Haemost. 2020 May;18(5):1094-1099. doi: 10.1111/jth.14817. Epub 2020 Apr 27. PubMed 32220112 ↗
  • Peng YD, Meng K, Guan HQ, Leng L, Zhu RR, Wang BY, He MA, Cheng LX, Huang K, Zeng QT. [Clinical characteristics and outcomes of 112 cardiovascular disease patients infected by 2019-nCoV]. Zhonghua Xin Xue Guan Bing Za Zhi. 2020 Jun 24;48(6):450-455. doi: 10.3760/cma.j.cn112148-20200220-00105. Chinese. PubMed 32120458 ↗
  • Lighter J, Phillips M, Hochman S, Sterling S, Johnson D, Francois F, Stachel A. Obesity in Patients Younger Than 60 Years Is a Risk Factor for COVID-19 Hospital Admission. Clin Infect Dis. 2020 Jul 28;71(15):896-897. doi: 10.1093/cid/ciaa415. No abstract available. PubMed 32271368 ↗
  • Verity R, Okell LC, Dorigatti I, Winskill P, Whittaker C, Imai N, Cuomo-Dannenburg G, Thompson H, Walker PGT, Fu H, Dighe A, Griffin JT, Baguelin M, Bhatia S, Boonyasiri A, Cori A, Cucunuba Z, FitzJohn R, Gaythorpe K, Green W, Hamlet A, Hinsley W, Laydon D, Nedjati-Gilani G, Riley S, van Elsland S, Volz E, Wang H, Wang Y, Xi X, Donnelly CA, Ghani AC, Ferguson NM. Estimates of the severity of coronavirus disease 2019: a model-based analysis. Lancet Infect Dis. 2020 Jun;20(6):669-677. doi: 10.1016/S1473-3099(20)30243-7. Epub 2020 Mar 30. PubMed 32240634 ↗
  • Banerjee A, Pasea L, Harris S, Gonzalez-Izquierdo A, Torralbo A, Shallcross L, Noursadeghi M, Pillay D, Sebire N, Holmes C, Pagel C, Wong WK, Langenberg C, Williams B, Denaxas S, Hemingway H. Estimating excess 1-year mortality associated with the COVID-19 pandemic according to underlying conditions and age: a population-based cohort study. Lancet. 2020 May 30;395(10238):1715-1725. doi: 10.1016/S0140-6736(20)30854-0. Epub 2020 May 12. PubMed 32405103 ↗
  • Schulman S, Kearon C; Subcommittee on Control of Anticoagulation of the Scientific and Standardization Committee of the International Society on Thrombosis and Haemostasis. Definition of major bleeding in clinical investigations of antihemostatic medicinal products in non-surgical patients. J Thromb Haemost. 2005 Apr;3(4):692-4. doi: 10.1111/j.1538-7836.2005.01204.x. PubMed 15842354 ↗
  • Kaatz S, Ahmad D, Spyropoulos AC, Schulman S; Subcommittee on Control of Anticoagulation. Definition of clinically relevant non-major bleeding in studies of anticoagulants in atrial fibrillation and venous thromboembolic disease in non-surgical patients: communication from the SSC of the ISTH. J Thromb Haemost. 2015 Nov;13(11):2119-26. doi: 10.1111/jth.13140. No abstract available. PubMed 26764429 ↗
  • Day M. Covid-19: four fifths of cases are asymptomatic, China figures indicate. BMJ. 2020 Apr 2;369:m1375. doi: 10.1136/bmj.m1375. No abstract available. PubMed 32241884 ↗
  • Wang D, Hu B, Hu C, Zhu F, Liu X, Zhang J, Wang B, Xiang H, Cheng Z, Xiong Y, Zhao Y, Li Y, Wang X, Peng Z. Clinical Characteristics of 138 Hospitalized Patients With 2019 Novel Coronavirus-Infected Pneumonia in Wuhan, China. JAMA. 2020 Mar 17;323(11):1061-1069. doi: 10.1001/jama.2020.1585. PubMed 32031570 ↗
  • Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, Zhang L, Fan G, Xu J, Gu X, Cheng Z, Yu T, Xia J, Wei Y, Wu W, Xie X, Yin W, Li H, Liu M, Xiao Y, Gao H, Guo L, Xie J, Wang G, Jiang R, Gao Z, Jin Q, Wang J, Cao B. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020 Feb 15;395(10223):497-506. doi: 10.1016/S0140-6736(20)30183-5. Epub 2020 Jan 24. PubMed 31986264 ↗
  • Mehta P, McAuley DF, Brown M, Sanchez E, Tattersall RS, Manson JJ; HLH Across Speciality Collaboration, UK. COVID-19: consider cytokine storm syndromes and immunosuppression. Lancet. 2020 Mar 28;395(10229):1033-1034. doi: 10.1016/S0140-6736(20)30628-0. Epub 2020 Mar 16. No abstract available. PubMed 32192578 ↗
  • Mousavi S, Moradi M, Khorshidahmad T, Motamedi M. Anti-Inflammatory Effects of Heparin and Its Derivatives: A Systematic Review. Adv Pharmacol Sci. 2015;2015:507151. doi: 10.1155/2015/507151. Epub 2015 May 12. PubMed 26064103 ↗
  • Proschan MA. Two-stage sample size re-estimation based on a nuisance parameter: a review. J Biopharm Stat. 2005;15(4):559-74. doi: 10.1081/BIP-200062852. PubMed 16022163 ↗
  • Santos BC, Flumignan RL, Civile VT, Atallah AN, Nakano LC. Prophylactic anticoagulants for non-hospitalised people with COVID-19. Cochrane Database Syst Rev. 2023 Aug 16;8(8):CD015102. doi: 10.1002/14651858.CD015102.pub2. PubMed 37591523 ↗
  • Cools F, Virdone S, Sawhney J, Lopes RD, Jacobson B, Arcelus JI, Hobbs FDR, Gibbs H, Himmelreich JCL, MacCallum P, Schellong S, Haas S, Turpie AGG, Ageno W, Rocha AT, Kayani G, Pieper K, Kakkar AK; ETHIC investigators. Thromboprophylactic low-molecular-weight heparin versus standard of care in unvaccinated, at-risk outpatients with COVID-19 (ETHIC): an open-label, multicentre, randomised, controlled, phase 3b trial. Lancet Haematol. 2022 Aug;9(8):e594-e604. doi: 10.1016/S2352-3026(22)00173-9. Epub 2022 Jun 30. PubMed 35779560 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Oct 2020 to primary completion in Nov 2021, 13 months.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 22, 2020
First posted
Jul 30, 2020
StartActual
Oct 27, 2020
Primary completionActual
Nov 29, 2021
CompletionActual
Nov 29, 2021
Last update
May 2, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 2, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04492254
Lead sponsor
Thrombosis Research Institute
Collaborators
Sanofi
Responsible party
Sponsor
First posted
Jul 30, 2020
Start date
Oct 27, 2020
Primary completion
Nov 29, 2021
Completion
Nov 29, 2021
Last update
May 2, 2022

Study contacts

Ajay Kakkar
study director · Thrombosis Research Institute

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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