Trial Outcomes & Findings for The Impact of Vaccination on Severity of Illness in COVID-19 (NCT NCT04912700)

NCT ID: NCT04912700

Last Updated: 2021-09-30

Results Overview

Number of participants with encounters at emergency center (EC) and /or hospitalizations with positive COVID-19 test

Recruitment status

COMPLETED

Target enrollment

11834 participants

Primary outcome timeframe

During the period from December 15, 2020 through April 30, 2021 (up to 5 months)

Results posted on

2021-09-30

Participant Flow

Participant milestones

Participant milestones
Measure
Unvaccinated
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Overall Study
STARTED
10880
825
129
Overall Study
COMPLETED
10880
825
129
Overall Study
NOT COMPLETED
0
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

The Impact of Vaccination on Severity of Illness in COVID-19

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson). COVID-19 vaccine: Full or partial reception of vaccine
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson). COVID-19 vaccine: Full or partial reception of vaccine
Total
n=11834 Participants
Total of all reporting groups
Age, Continuous
52.1 years
STANDARD_DEVIATION 18.2 • n=5 Participants
62.5 years
STANDARD_DEVIATION 15.3 • n=7 Participants
70.3 years
STANDARD_DEVIATION 16.4 • n=5 Participants
53.0 years
STANDARD_DEVIATION 18.2 • n=4 Participants
Sex: Female, Male
Female
5750 Participants
n=5 Participants
425 Participants
n=7 Participants
69 Participants
n=5 Participants
6244 Participants
n=4 Participants
Sex: Female, Male
Male
5130 Participants
n=5 Participants
400 Participants
n=7 Participants
60 Participants
n=5 Participants
5590 Participants
n=4 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Black or African American
3452 Participants
n=5 Participants
198 Participants
n=7 Participants
13 Participants
n=5 Participants
3663 Participants
n=4 Participants
Race (NIH/OMB)
White
6467 Participants
n=5 Participants
559 Participants
n=7 Participants
108 Participants
n=5 Participants
7134 Participants
n=4 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
0 Participants
n=4 Participants
Race (NIH/OMB)
Unknown or Not Reported
961 Participants
n=5 Participants
68 Participants
n=7 Participants
8 Participants
n=5 Participants
1037 Participants
n=4 Participants
Region of Enrollment
United States
10880 participants
n=5 Participants
825 participants
n=7 Participants
129 participants
n=5 Participants
11834 participants
n=4 Participants

PRIMARY outcome

Timeframe: During the period from December 15, 2020 through April 30, 2021 (up to 5 months)

Population: Study population is defined as numbers of participants presenting to EC or hospitalized.

Number of participants with encounters at emergency center (EC) and /or hospitalizations with positive COVID-19 test

Outcome measures

Outcome measures
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Participants With Emergency Center (EC) Encounters and/or Hospitalizations With Positive COVID-19 Test
10880 Participants
825 Participants
129 Participants

SECONDARY outcome

Timeframe: During EC visit or hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed on all patients presenting to EC including those hospitalized

Patient with any of the following: ICU admission, mechanical ventilation, or in-hospital mortality

Outcome measures

Outcome measures
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Patients With Severe Infection
733 Participants
85 Participants
16 Participants

SECONDARY outcome

Timeframe: During hospitalization, from date of admission until May 15, 2021 (up to 5 months)

Population: Analysis performed on all patients presenting to EC including those hospitalized

Number of patients admitted to ICU during hospital stay

Outcome measures

Outcome measures
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Patients With ICU Admission
619 Participants
75 Participants
14 Participants

SECONDARY outcome

Timeframe: During EC visit or in-patient hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed on all patients presenting to EC including those hospitalized

Number of patients who required mechanical ventilation

Outcome measures

Outcome measures
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Patients Requiring Mechanical Ventilation
398 Participants
42 Participants
6 Participants

SECONDARY outcome

Timeframe: During EC visit or in-patient hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed on all patients presenting to EC including those hospitalized

Number of patients who died during EC visit or hospital admission

Outcome measures

Outcome measures
Measure
Unvaccinated
n=10880 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=129 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Patients With In-hospital Mortality
384 Participants
50 Participants
8 Participants

SECONDARY outcome

Timeframe: During hospitalization, from date of admission until May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients hospitalized

Number of hospitalized patients requiring ECMO

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Hospitalized Patients Requiring Extracorporeal Membrane Oxygenation (ECMO)
4 Participants
0 Participants
0 Participants

SECONDARY outcome

Timeframe: During hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients hospitalized

Number of hospitalized patients requiring RRT

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Hospitalized Patients Requiring Renal Replacement Therapy (RRT)
130 Participants
14 Participants
0 Participants

SECONDARY outcome

Timeframe: During hospitalization, from date of admission until May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients hospitalized

Number of hospitalized patients requiring supplemental oxygen, by type

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Hospitalized Patients Requiring Supplemental Oxygen
Nasal canula
2563 Participants
231 Participants
38 Participants
Number of Hospitalized Patients Requiring Supplemental Oxygen
High flow oxygen
656 Participants
67 Participants
10 Participants
Number of Hospitalized Patients Requiring Supplemental Oxygen
Non-invasive ventilation
428 Participants
56 Participants
10 Participants
Number of Hospitalized Patients Requiring Supplemental Oxygen
Mechanical ventilation
395 Participants
42 Participants
6 Participants
Number of Hospitalized Patients Requiring Supplemental Oxygen
none
1208 Participants
119 Participants
31 Participants

SECONDARY outcome

Timeframe: During EC visit or hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients hospitalized

Number of hospitalized patients requiring non-invasive ventilation

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Hospitalized Patients Requiring Non-invasive Ventilation
428 Participants
56 Participants
10 Participants

SECONDARY outcome

Timeframe: During EC visit or hospitalization, from date of presentation until May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients hospitalized

Number of hospitalized patients with hypotension requiring vasopressors

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Hospitalized Patients Requiring Vasopressors
348 Participants
45 Participants
6 Participants

SECONDARY outcome

Timeframe: During the period from December 15, 2020 through May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients who were admitted to hospital

Number of patients discharged from in-patient hospital admission to home, skilled nursing facility, rehabilitation facility, or hospice.

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Home
4110 Participants
368 Participants
61 Participants
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Rehabilitation Institute
72 Participants
7 Participants
0 Participants
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Skilled Nursing Home
514 Participants
66 Participants
20 Participants
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Hospice
125 Participants
21 Participants
6 Participants
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Transferred to another facility
50 Participants
4 Participants
0 Participants
Number of Patients Discharged From Hospital to Home, Skilled Nursing Facility, Rehabilitation Facility, or Hospice.
Death
379 Participants
49 Participants
8 Participants

SECONDARY outcome

Timeframe: During the period from December 15, 2020 through May 15, 2021 (up to 5 months)

Population: Analysis performed only on patients admitted to hospital after EC visit

Number of days from admission after emergency center (EC) visit and positive COVID-19 test, until discharge

Outcome measures

Outcome measures
Measure
Unvaccinated
n=5250 Participants
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=515 Participants
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson).
Fully Vaccinated
n=95 Participants
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson).
Hospital Length of Stay
7.2 days
Standard Deviation 7.0
7.3 days
Standard Deviation 6.3
7.0 days
Standard Deviation 5.2

Adverse Events

Unvaccinated

Serious events: 4176 serious events
Other events: 0 other events
Deaths: 384 deaths

Partially Vaccinated

Serious events: 410 serious events
Other events: 0 other events
Deaths: 50 deaths

Fully Vaccinated

Serious events: 64 serious events
Other events: 0 other events
Deaths: 8 deaths

Serious adverse events

Serious adverse events
Measure
Unvaccinated
n=10880 participants at risk
Unvaccinated individuals are defined as having positive laboratory COVID-19 testing with no record of immunization against COVID-19 or first-dose vaccination after symptom onset.
Partially Vaccinated
n=825 participants at risk
Partially vaccinated individuals are defined as having positive laboratory COVID-19 testing and symptom onset after a single dose of either mRNA (Pfizer, Moderna) vaccine, or \< 14 days after the second dose of either mRNA vaccine (Pfizer, Moderna) or \< 14 days after the administration of the single dose of viral vector vaccine (Johnson \& Johnson). COVID-19 vaccine: Full or partial reception of vaccine
Fully Vaccinated
n=129 participants at risk
Fully vaccinated individuals are defined as having positive laboratory testing for COVID-19 and symptom onset \>14 days since administration of second dose of either mRNA vaccine, or \>14 days since administration of viral vector vaccine (Johnson \& Johnson). COVID-19 vaccine: Full or partial reception of vaccine
Respiratory, thoracic and mediastinal disorders
Respiratory insufficiency
37.2%
4046/10880 • Number of events 4046 • December 15, 2020 through May 15, 2021 (up to 5 months)
48.0%
396/825 • Number of events 396 • December 15, 2020 through May 15, 2021 (up to 5 months)
49.6%
64/129 • Number of events 64 • December 15, 2020 through May 15, 2021 (up to 5 months)
Renal and urinary disorders
Acute renal failure
1.2%
130/10880 • Number of events 130 • December 15, 2020 through May 15, 2021 (up to 5 months)
1.7%
14/825 • Number of events 14 • December 15, 2020 through May 15, 2021 (up to 5 months)
0.00%
0/129 • December 15, 2020 through May 15, 2021 (up to 5 months)
Cardiac disorders
Hypotension
3.2%
348/10880 • Number of events 348 • December 15, 2020 through May 15, 2021 (up to 5 months)
5.5%
45/825 • Number of events 45 • December 15, 2020 through May 15, 2021 (up to 5 months)
4.7%
6/129 • Number of events 6 • December 15, 2020 through May 15, 2021 (up to 5 months)

Other adverse events

Adverse event data not reported

Additional Information

Ahmit Bahl, MD

Beaumont Hospitals

Phone: (248) 898-9111

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place