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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT04376684
Other study ID # 214094
Secondary ID
Status Completed
Phase Phase 2
First received
Last updated
Start date May 28, 2020
Est. completion date August 16, 2021

Study information

Verified date March 2022
Source GlaxoSmithKline
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

OSCAR (Otilimab in Severe COVID-19 Related Disease) is a multi-center, double-blind, randomized, placebo-controlled trial to assess the efficacy and safety of otilimab for the treatment of severe pulmonary COVID-19 related disease. The study is being conducted in 2 parts (Part 1 and Part 2). Otilimab is a human monoclonal anti-granulocyte macrophage colony stimulating factor (GM-CSF) antibody that has not previously been tested in participants with severe pulmonary COVID-19 related disease in Part 1. The aim of this study is to evaluate the benefit-risk of a single infusion of otilimab in the treatment of hospitalized participants with severe COVID-19 related pulmonary disease with new onset hypoxia requiring significant oxygen support or requiring early invasive mechanical ventilation (less than or equal to [<=] 48 hours before dosing). Participants will be randomized to receive a single intravenous (IV) infusion of otilimab or placebo, in addition to standard of care.


Recruitment information / eligibility

Status Completed
Enrollment 1156
Est. completion date August 16, 2021
Est. primary completion date July 15, 2021
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion criteria for Part 1: - Participants aged >=18 years and <=79 years at the time of obtaining informed consent. - Participants must: 1. have positive severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) result (any validated test, for example. reverse transcription polymerase chain reaction [RT-PCR] [performed on an appropriate specimen; for example: respiratory tract sample]) 2. and be hospitalized due to diagnosis of pneumonia (chest X-ray or computerized tomography [CT] scan consistent with COVID-19) 3. and be developing new onset of oxygenation impairment requiring any of the following: 1. high-flow oxygen (>=15L/min) 2. non-invasive ventilation (for example. CPAP, BIPAP) 3. mechanical ventilation <=48 hours prior to dose 4. and have increased biological markers of systemic inflammation (either C-reactive protein [CRP] >upper limit of normal [ULN] or serum ferritin >ULN). - No gender restriction. - Female participants must meet and agree to abide by the contraceptive criteria detailed in the protocol. Contraceptive use by women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies. - A female participant is eligible to participate if she is not pregnant or breastfeeding or if she is using highly effective contraceptive methods. Women of non-childbearing potential can also participate. A negative highly sensitive pregnancy test at hospital admission or before the first dose of study intervention. - Capable of giving written informed consent. Inclusion Criteria for Part 2: - Participants aged 70 years or above at the time of obtaining informed consent. - Participants must: 1. have positive SARS-CoV-2 result (any validated test, for example. RT-PCR [performed on an appropriate specimen; for example. respiratory tract sample]) 2. and be hospitalized due to diagnosis of pneumonia (chest X-ray or CT scan consistent with COVID-19). 3. and be developing new onset of oxygenation impairment requiring any of the following: 1. high-flow oxygen (>=15L/min) 2. non-invasive ventilation (for example. CPAP, BiPAP) 3. mechanical ventilation <=48 hours prior to dose 4. and have increased biological markers of systemic inflammation (either CRP >ULN or serum ferritin >ULN. - No gender restriction. - Capable of giving written informed consent. Exclusion Criteria for Part 1: - Progression to death is imminent and inevitable within the next 48 hours, irrespective of the provision of treatments, in the opinion of the investigator. - Multiple organ failure according to the investigator's judgement or a Sequential Organ Failure assessment (SOFA score) >10 if in the ICU. - Extracorporeal membrane oxygenation (ECMO) hemofiltration/dialysis or high-dose (>0.15 micrograms [mcg]/kilograms [kg]/min) noradrenaline (or equivalent) or more than one vasopressor. - Current serious or uncontrolled medical condition (for example: significant pulmonary disease [such as severe chronic obstructive pulmonary disease (COPD) or pulmonary fibrosis], heart failure [New York Heart Association {NYHA} class III or higher], renal dysfunction, acute myocardial infarction or acute cerebrovascular accident within the last 3 months) or abnormality of clinical laboratory tests that, in the investigator's judgment, precludes the participant's safe participation in and completion of the study. - Untreated systemic bacterial, fungal, viral, or other infection (other than SARS-CoV-2). - Known active tuberculosis (TB), history of untreated or incompletely treated active or latent TB, suspected or known extrapulmonary TB. - Known Human Immunodeficiency Virus (HIV) regardless of immunological status. - Known hepatitis B surface antigen (HBsAg) and/or anti-hepatitis C virus (HCV) positive. - Currently receiving radiotherapy, chemotherapy or immunotherapy for malignancy. - Received monoclonal antibody therapy (for examplee. tocilizumab, sarilumab) within the past 3 months prior to randomization, including intravenous immunoglobulin, or planned to be received, during the study. - Received immunosuppressant therapy including but not limited to cyclosporin, azathioprine, tacrolimus, mycophenolate, Janus Kinase (JAK) inhibitors (for examplee. baricitinib, tofacitinib, upadacitinib) within the last 3 months prior to randomization or planned to be received during the study. - History of allergic reaction, including anaphylaxis to any previous treatment with an anti-GM-CSF therapy. - Received COVID-19 convalescent plasma within 48 hours of randomization. - Currently receiving chronic oral corticosteroids for a non-COVID-19 related condition in a dose higher than prednisone 10 milligrams (mg) or equivalent per day. - Treatment with an investigational drug within 30 days of randomization. - Participating in other drug clinical trials, including for COVID-19. - Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) >5 times ULN. - Platelets <50,000/cubic millimeters (mm^3) - Hemoglobin <=9 grams per deciliter (g/dL) - Absolute neutrophil count (ANC) <1.5 times 10^9/L (neutropenia >= Grade 2) - Estimated glomerular filtration rate (GFR) <=30 milliliters (mL)/min/1.73 meter square (/m^2). - Pregnant or breastfeeding females. Exclusion Criteria for Part 2: - Progression to death is imminent and inevitable within the next 48 hours, irrespective of the provision of treatments, in the opinion of the investigator. - Multiple organ failure according to the investigator's judgement or a SOFA score >10 if intubated in the ICU. - ECMO hemofiltration/dialysis, or more than one inotrope/vasopressor of any class. - Current serious or uncontrolled medical condition (for example. significant pulmonary disease [such as severe COPD or pulmonary fibrosis], heart failure [NYHA class III or higher], severe renal dysfunction, acute myocardial infarction or acute cerebrovascular accident within the last 3 months), severe dementia, severe disability, or abnormality of clinical laboratory tests that, in the investigator's judgment, precludes the participant's safe participation in and completion of the study. - Untreated systemic bacterial, fungal, viral, or other infection (other than SARSCoV-2). - Known active TB, history of untreated or incompletely treated active or latent TB, suspected or known extrapulmonary TB. - Known HIV regardless of immunological status. - Known HBsAg and/or anti-HCV positive (participants demonstrating a sustained virologic response (SVR) are not excluded from participation). - Currently receiving radiotherapy, chemotherapy (hormone based therapies are permitted) or immunotherapy for malignancy. - Received monoclonal antibody therapy (for example. tocilizumab, sarilumab) within the past 3 months prior to randomization, including intravenous immunoglobulin, or planned to be received during the study. - Received immunosuppressant therapy including but not limited to cyclosporin, azathioprine, tacrolimus, mycophenolate, JAK inhibitors (for example. baricitinib, tofacitinib, upadacitinib), nintedanib, disease modifying antirheumatic drugs (DMARDs) (for example. methotrexate) within the last 3 months prior to randomization or planned to be received during the study. - History of allergic reaction, including anaphylaxis to any previous treatment with an anti-GM-CSF therapy. - Received COVID-19 convalescent plasma within 48 hours of randomization. - Currently receiving chronic oral corticosteroids for a non-COVID-19 related condition at a dose higher than prednisone 10 mg or equivalent per day. - Treatment with an investigational drug or substance within 30 days of randomization unless approved by the Medical Monitor. - Participating in other drug clinical trials, including for COVID-19. - AST or ALT >5 times ULN. - Platelets <50,000/mm^3. - Hemoglobin <=9 g/dL - ANC <1.0 x 10^9/L (neutropenia >= Grade 3). - Estimated GFR <=30 mL/min/1.73 m^2.

Study Design


Related Conditions & MeSH terms

  • COVID-19
  • Severe Acute Respiratory Syndrome

Intervention

Biological:
Otilimab
Otilimab will be administered once via IV route.
Placebo 1
Placebo 1 will consist of sterile 0.9 percent (%) sodium chloride solution administered once via IV route.
Placebo 2
Placebo 2 will consist of sterile 5% dextrose or 5% glucose solution administered once via IV route.
Drug:
Standard of care
All participants will receive standard of care as per institutional protocol.

Locations

Country Name City State
Argentina GSK Investigational Site Buenos Aires
Argentina GSK Investigational Site Buenos Aires
Argentina GSK Investigational Site Cordoba
Argentina GSK Investigational Site Cordoba
Argentina GSK Investigational Site Cordoba Córdova
Argentina GSK Investigational Site Munro Buenos Aires
Belgium GSK Investigational Site Brussel
Belgium GSK Investigational Site Yvoir
Brazil GSK Investigational Site Belo Horizonte Minas Gerais
Brazil GSK Investigational Site Porto Alegre Rio Grande Do Sul
Brazil GSK Investigational Site São Paulo
Brazil GSK Investigational Site São Paulo
Brazil GSK Investigational Site São Paulo
Brazil GSK Investigational Site São Paulo
Canada GSK Investigational Site Montréal Quebec
Canada GSK Investigational Site Ottawa Ontario
Canada GSK Investigational Site Ottawa Ontario
Canada GSK Investigational Site QC Quebec
Canada GSK Investigational Site St-Jerome Quebec
Canada GSK Investigational Site Vancouver British Columbia
Chile GSK Investigational Site Santiago
Chile GSK Investigational Site Santiago
Colombia GSK Investigational Site Bogotá
France GSK Investigational Site Amiens Cedex 1
France GSK Investigational Site Angers Cedex 9
France GSK Investigational Site Argenteuil
France GSK Investigational Site La Roche-Sur-Yon
France GSK Investigational Site La Tronche
France GSK Investigational Site Limoges Cedex
France GSK Investigational Site Melun
France GSK Investigational Site Paris
France GSK Investigational Site Pierre-Bénite
France GSK Investigational Site Strasbourg
France GSK Investigational Site Strasbourg cedex
France GSK Investigational Site Valenciennes Cedex
India GSK Investigational Site Aurangabad
India GSK Investigational Site Aurangabad
India GSK Investigational Site Hyderabad
India GSK Investigational Site Kolkata
India GSK Investigational Site Kolkata
India GSK Investigational Site Mumbai
India GSK Investigational Site Nagpur
India GSK Investigational Site New Delhi
India GSK Investigational Site Pune
India GSK Investigational Site Pune
Italy GSK Investigational Site Napoli Campania
Japan GSK Investigational Site Aichi
Japan GSK Investigational Site Kanagawa
Japan GSK Investigational Site Kanagawa
Japan GSK Investigational Site Osaka
Japan GSK Investigational Site Saitama
Japan GSK Investigational Site Tokyo
Japan GSK Investigational Site Tokyo
Japan GSK Investigational Site Tokyo
Japan GSK Investigational Site Tokyo
Mexico GSK Investigational Site Guadalajara Jalisco
Mexico GSK Investigational Site Mexico
Mexico GSK Investigational Site Mexico City Ciudad De Mexico
Mexico GSK Investigational Site Monterrey Nuevo León
Netherlands GSK Investigational Site Breda
Netherlands GSK Investigational Site Den Bosch
Netherlands GSK Investigational Site Enschede
Netherlands GSK Investigational Site Nijmegen
Netherlands GSK Investigational Site Rotterdam
Peru GSK Investigational Site Lima
Peru GSK Investigational Site Lima
Peru GSK Investigational Site Lima
Poland GSK Investigational Site Bydgoszcz
Poland GSK Investigational Site Krakow
Poland GSK Investigational Site Poznan
Poland GSK Investigational Site Warszawa
Poland GSK Investigational Site Wroclaw
Russian Federation GSK Investigational Site Barnaul
Russian Federation GSK Investigational Site Chelyabinsk
Russian Federation GSK Investigational Site Ekaterinburg
Russian Federation GSK Investigational Site Moscow
Russian Federation GSK Investigational Site Nizhniy Novgorod
Russian Federation GSK Investigational Site Omsk
Russian Federation GSK Investigational Site Perm
Russian Federation GSK Investigational Site St. Petersburg
Russian Federation GSK Investigational Site Ufa
Russian Federation GSK Investigational Site Voronezh
South Africa GSK Investigational Site Benoni Gauteng
South Africa GSK Investigational Site Durban KwaZulu- Natal
South Africa GSK Investigational Site Johannesburg Gauteng
South Africa GSK Investigational Site Panorama,
South Africa GSK Investigational Site Tygerberg
South Africa GSK Investigational Site Worcester
Spain GSK Investigational Site Barcelona
Spain GSK Investigational Site L'Hospitalet de Llobregat
Spain GSK Investigational Site Logroño
Spain GSK Investigational Site Madrid
Spain GSK Investigational Site Madrid
Spain GSK Investigational Site Madrid
Spain GSK Investigational Site Madrid
Spain GSK Investigational Site San Sebastián De Los Reyes/Madrid
United Kingdom GSK Investigational Site Liverpool
United Kingdom GSK Investigational Site Manchester Greater Manchester
United Kingdom GSK Investigational Site Newcastle Upon Tyne
United States GSK Investigational Site Baltimore Maryland
United States GSK Investigational Site Buffalo New York
United States GSK Investigational Site Charlotte North Carolina
United States GSK Investigational Site Doylestown Pennsylvania
United States GSK Investigational Site Gainesville Florida
United States GSK Investigational Site Germantown Maryland
United States GSK Investigational Site Jackson Mississippi
United States GSK Investigational Site Little Rock Arkansas
United States GSK Investigational Site Milwaukee Wisconsin
United States GSK Investigational Site Mobile Alabama
United States GSK Investigational Site Philadelphia Pennsylvania
United States GSK Investigational Site Reno Nevada
United States GSK Investigational Site Roanoke Virginia
United States GSK Investigational Site Sacramento California
United States GSK Investigational Site Saint Louis Park Minnesota
United States GSK Investigational Site Saint Paul Minnesota
United States GSK Investigational Site Silver Spring Maryland
United States GSK Investigational Site Tacoma Washington
United States GSK Investigational Site Toledo Ohio
United States GSK Investigational Site Torrance California
United States GSK Investigational Site Winfield Illinois

Sponsors (1)

Lead Sponsor Collaborator
GlaxoSmithKline

Countries where clinical trial is conducted

United States,  Argentina,  Belgium,  Brazil,  Canada,  Chile,  Colombia,  France,  India,  Italy,  Japan,  Mexico,  Netherlands,  Peru,  Poland,  Russian Federation,  South Africa,  Spain,  United Kingdom, 

Outcome

Type Measure Description Time frame Safety issue
Primary Part 1: Percentage of Participants Alive and Free of Respiratory Failure at Day 28 Participants were considered alive and free of respiratory failure if they were in category 1, 2, 3, or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (greater than or equal to [>=]15 liters per minute [L/min]), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 28
Primary Part 2: Percentage of Participants Alive and Free of Respiratory Failure at Day 28 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 28
Secondary Part 1: Number of Participants Who Died Due to All Causes at Day 60 Number of participants who died due to all causes at Day 60 are reported. At Day 60
Secondary Part 2: Number of Participants Who Died Due to All Causes at Day 28 Number of participants who died due to all causes at Day 28 is reported At Day 28
Secondary Part 2: Number of Participants Who Died Due to All Causes at Day 60 Number of participants who died due to all causes at Day 60 is reported At Day 60
Secondary Part 1: Time to Death Due to All Causes up to Day 60 Time to death due to all causes was defined as the time (days) from dosing to death, due to any cause, up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to death are presented. Up to Day 60
Secondary Part 2: Time to Death Due to All Causes up to Day 60 Time to death due to all causes was defined as the time (days) from dosing to death, due to any cause, up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to death are presented. Up to Day 60
Secondary Part 1: Percentage of Participants Alive and Free of Respiratory Failure at Day 7 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 7
Secondary Part 1: Percentage of Participants Alive and Free of Respiratory Failure at Day 14 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 14
Secondary Part 1: Percentage of Participants Alive and Free of Respiratory Failure at Day 42 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 42
Secondary Part 1: Percentage of Participants Alive and Free of Respiratory Failure at Day 60 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 60
Secondary Part 2: Percentage of Participants Alive and Free of Respiratory Failure at Day 7 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 7
Secondary Part 2: Percentage of Participants Alive and Free of Respiratory Failure at Day 14 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 14
Secondary Part 2: Percentage of Participants Alive and Free of Respiratory Failure at Day 42 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 42
Secondary Part 2: Percentage of Participants Alive and Free of Respiratory Failure at Day 60 Participants were alive and free of respiratory failure if they were in category 1, 2, 3 or 4 from the GlaxoSmithKline (GSK) modified version ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Higher scale indicates higher intensity of respiratory failure. Percentage values are rounded off. At Day 60
Secondary Part 1: Time to Recovery From Respiratory Failure up to Day 28 Time to recovery from respiratory failure was defined as the time (days) from dosing to last recovery from respiratory failure up to (and including) Day 28. Participants were in respiratory failure if they were in category 5 or above from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Median and inter-quartile range (first quartile and third quartile) of time to recovery from respiratory failure are presented. Up to Day 28
Secondary Part 2: Time to Recovery From Respiratory Failure up to Day 28 Time to recovery from respiratory failure was defined as the time (days) from dosing to last recovery from respiratory failure up to (and including) Day 28. Participants were in respiratory failure if they were in category 5 or above from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Median and inter-quartile range (first quartile and third quartile) of time to recovery from respiratory failure are presented. Up to Day 28
Secondary Part 1: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 7 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 7
Secondary Part 1: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 14 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 14
Secondary Part 1: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 28 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 28
Secondary Part 1: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 42 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 42
Secondary Part 1: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 60 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 60
Secondary Part 2: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 7 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 7
Secondary Part 2: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 14 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 14
Secondary Part 2: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 28 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 28
Secondary Part 2: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 42 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 42
Secondary Part 2: Percentage of Participants Alive and Independent of Supplementary Oxygen at Day 60 Participants were independent of supplementary oxygen if they were in category 1, 2 or 3 from the GlaxoSmithKline (GSK) modified ordinal scale adapted from World Health Organization (WHO) scale 2020. The 8-point scale was as follows: 1) Non-hospitalized, no limitation of activity; 2) Non-hospitalized,limitation of activity; 3) Hospitalized, no oxygen therapy; 4) Hospitalized, low-flow oxygen by mask or nasal prongs; 5) Hospitalized, highflow oxygen (>=15L/min), continuous positive airway pressure (CPAP), bilevel positive airway pressure (BIPAP), non-invasive ventilation; 6) Hospitalized, intubation and mechanical ventilation; 7) Hospitalized, mechanical ventilation plus additional organ support; 8) Death. Percentage values are rounded off. At Day 60
Secondary Part 1: Time to Last Dependence on Supplementary Oxygen Time to last dependence on supplementary oxygen was defined as the time (days) from dosing to last dependence on supplementary oxygen up to (and including) Day 28. Median and inter-quartile range (first quartile and third quartile) of time to last dependence on supplementary oxygen are presented. Up to Day 28
Secondary Part 2: Time to Last Dependence on Supplementary Oxygen Time to last dependence on supplementary oxygen was defined as the time (days) from dosing to last dependence on supplementary oxygen up to (and including) Day 28. Median and inter-quartile range (first quartile and third quartile) of time to last dependence on supplementary oxygen are presented. Up to Day 28
Secondary Part 1: Percentage of Participants Admitted to Intensive Care Unit (ICU) up to Day 28 Participants who were admitted to the ICU up to (and including) Day 28 were evaluated. Percentage values are rounded off. Up to Day 28
Secondary Part 1: Time to Final ICU Discharge Time to final ICU discharge was defined as the time from dosing to when the participant is discharged from the ICU for the last time up to (and including) Day 28. Median and inter-quartile range (first quartile and third quartile) of time to final ICU discharge is presented. Up to Day 28
Secondary Part 2: Time to Final ICU Discharge Time to final ICU discharge was defined as the time from dosing to when the participant was discharged from the ICU for the last time up to (and including) Day 28. Median and inter-quartile range (first quartile and third quartile) of time to final ICU discharge is presented. Up to Day 28
Secondary Part 1: Time to First Discharge From Investigator Site up to Day 60 Time to first discharge from investigator site was defined as the time (days) from dosing to when the participant was first discharged from investigator site (IS) up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to first discharge from investigator site is presented. Up to Day 60
Secondary Part 1: Time to First Discharge to Non-hospitalized Residence up to Day 60 Time to first discharge to non-hospitalized residence was defined as the time (days) from dosing to when the participant was discharged to a non-hospitalized residence for the first time up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to first discharge to non-hospitalized residence is presented. Up to Day 60
Secondary Part 2: Time to First Discharge From Investigator Site up to Day 60 Time to first discharge from investigator site was defined as the time (days) from dosing to when the participant was first discharged from investigator site up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to first discharge from investigator site is presented. Up to Day 60
Secondary Part 2: Time to First Discharge to Non-hospitalized Residence Time to first discharge to non-hospitalized residence was defined as the time (days) from dosing to when the participant was discharged to a non-hospitalized residence for the first time up to (and including) Day 60. Median and inter-quartile range (first quartile and third quartile) of time to first discharge to non-hospitalized residence is presented. Up to Day 60
Secondary Part 1: Number of Participants With Serious Adverse Events (SAEs) and Common (>=5%) Non-serious Adverse Events (Non-SAEs) An adverse event (AE) is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. An SAE is defined as any untoward medical occurrence that, at any dose may result in death or is life-threatening or requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent disability/incapacity or is a congenital anomaly/birth defect or any other situation according to medical or scientific judgment or is associated with liver injury and impaired liver function. Number of participants with any SAE and common (>=5%) non-SAEs are presented. Up to Day 60
Secondary Part 2: Number of Participants With SAEs and Common (>=5%) Non-SAEs An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. An SAE is defined as any untoward medical occurrence that, at any dose may result in death or is life-threatening or requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent disability/incapacity or is a congenital anomaly/birth defect or any other situation according to medical or scientific judgment or is associated with liver injury and impaired liver function. Number of participants with any SAE and common (>=5%) non-SAEs are presented. Up to Day 60
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