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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT05020145
Other study ID # C4591035
Secondary ID
Status Completed
Phase
First received
Last updated
Start date August 25, 2021
Est. completion date December 17, 2021

Study information

Verified date February 2024
Source Pfizer
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

This retrospective study will evaluate characteristics, vaccine utilization and outcomes among subjects with immunocompromising conditions that received COVID-19 vaccination.


Description:

The objective of this US-based retrospective cohort study is to evaluate characteristics, vaccine utilization and outcomes among subjects with immunocompromising conditions that received COVID-19 vaccination. Subjects will be aged 12 years and older and will have no evidence of prior SARS-CoV-2 infection. The primary analysis will be conducted on subjects vaccinated with BNT162b2. A variety of subgroup analyses and sensitivity analyses are planned.


Recruitment information / eligibility

Status Completed
Enrollment 1277747
Est. completion date December 17, 2021
Est. primary completion date December 17, 2021
Accepts healthy volunteers No
Gender All
Age group 12 Years and older
Eligibility Inclusion Criteria: Patients must meet all of the following inclusion criteria to be eligible for inclusion in the study: 1. Unique enrollees in the HealthVerity Vaccine dataset anytime after December 10, 2020 2. At least 12 years on the index date (ie, first vaccination date) 3. No evidence of prior COVID-19 infection (a medical claim, pharmacy claim, or chargemaster record with a diagnosis code of ICD-10-CM U07.1) in the 12 months prior to the index date 4. Have 12 months of continuous enrollment with medical benefits (with or without pharmacy benefits) prior to the index date. Subjects with an IC condition will be identified via an algorithm developed for use in administrative claims database studies. Exclusion criteria: subjects not meeting the criteria above will be excluded.

Study Design


Intervention

Biological:
BNT162b2 (Tozinameran)
Covid-19 Vaccine

Locations

Country Name City State
United States Pfizer Inc. New York New York

Sponsors (1)

Lead Sponsor Collaborator
Pfizer

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Incidence Rate of Breakthrough Cases of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection The incidence rate of breakthrough cases of SARS-CoV-2 infection was calculated as the number of participants who experienced the event divided by the observed time at risk and reported as incidence rate per 100 person-years. Rate of breakthrough SARS-CoV-2 infection among fully vaccinated participants was reported in this outcome measure. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Primary Time to SARS-CoV-2 Breakthrough Infection Time to SARS-CoV-2 breakthrough infection was calculated as the number of days from Dose 2 of vaccination till first occurrence of a breakthrough SARS-CoV-2 infection. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants With Emergency Department Visits After SARS-CoV-2 Infection In this outcome measure, number of participants with emergency department visits who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. Emergency department visits included an outpatient claim that occurs after the breakthrough COVID-19 diagnosis date or at the same time or episode of care. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants With Outpatient Hospital Visits After SARS-CoV-2 Infection In this outcome measure, number of participants with outpatient hospital visits who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. Outpatient hospital visits included an outpatient claim that occurs after the breakthrough COVID-19 diagnosis date or at the same time or episode of care other than emergency department visits. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants With Other Outpatient Visits After SARS-CoV-2 Infection In this outcome measure, number of participants with other outpatient visits (excluding emergency department visits and outpatient hospital visits) who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants Hospitalized After SARS-CoV-2 Infection In this outcome measure, number of participants hospitalized who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants Admitted to Intensive Care Unit (ICU) During Hospitalization After SARS-CoV-2 Infection In this outcome measure, number of participants admitted to ICU with or without Invasive Mechanical Ventilation (IMV) during hospitalization who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants Who Received Invasive Mechanical Ventilation (IMV) During Hospitalization After SARS-CoV-2 Infection In this outcome measure, number of participants who received IMV with or without ICU admission during hospitalization who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Number of Participants Died During Hospitalization After SARS-CoV-2 Infection In this outcome measure, number of participants who died during hospitalization who were fully vaccination and had SARS-CoV-2 breakthrough infection were analyzed. From 14 days after Dose 2 of BNT162b2 vaccine up to COVID-19 vaccine breakthrough infection case or end of continuous enrollment, whichever occurred first (retrospective data was retrieved and observed during 4 months approximately)
Secondary Total Duration of Stay in Hospital After SARS-CoV-2 Infection Total duration of stay was total time spend by the participant for different types of hospitalization treatments, applicable for first hospitalization and/or readmissions. From Dose 2 of COVID-19 vaccination till the end of study (retrospective data was retrieved and observed during 4 months of this study)
Secondary Total Expenditure on Healthcare Resource Utilization (HCRU) After SARS-CoV-2 Infection Total expenditure on HCRU was defined as total non-zero costs associated with any of the previously listed outpatient and inpatient encounters. From Dose 2 of COVID-19 vaccination till the end of study (retrospective data was retrieved and observed during 4 months of this study)
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