Study type

Study topic

Disease /health condition
Human medicinal product

Study type

Non-interventional study
Non-interventional study

Scope of the study

Assessment of risk minimisation measure implementation or effectiveness
Drug utilisation

Data collection methods

Secondary data collection

Non-interventional study design

Cohort
Other

Non-interventional study design, other

Retrospective, multi-database, self-controlled risk interval study
Study drug and medical condition

Anatomical Therapeutic Chemical (ATC) code

200000015711
covid-19 vaccines

Medical condition to be studied

Guillain-Barre syndrome

Additional medical condition(s)

All COVID-19 AESI
Population studied

Short description of the study population

The study involved three cohorts: readiness, rapid assessment, and methodological assessment. Readiness cohort included subjects in the source population who were in follow-up for at least 365 days or were born during the study period. Rapid assessment cohort included subjects with the outcome of interest and a COVID-19 vaccination, while methodological assessment cohort included vaccinated subjects and different matched comparisons.
Inclusion Criteria:
Readiness study:
For the readiness study, the person will be included if there is at least one day of follow-up and the person has at least 12 months of data in the data source at the start of follow-up.
SCRI Design:
For analyses of outcomes assessed with the SCRI design, the following criteria must be met. Note that the study population for each outcome-specific analysis will thus be different.
• Received a dose of COVID-19 vaccine during the study period.
• Have experienced a specific event of interest during the predefined observation period.
• Have at least 12 months of data/registration in the data sources at study entry.
Cohort design:
Individuals must meet all the following inclusion criteria to be eligible for inclusion in the cohort study:
• At time zero, being in the underlying population of the data source for at least 12 months; or, being born in the previous 12 months in the underlying population.
• Study participants must be eligible (eg, lack of contra-indications) to receive the COVID-19 vaccines at time zero.
Exclusion Criteria:
For the readiness study, there will be no exclusion criteria.
Individuals will be excluded from the rapid assessment studies if:
• They have a recorded diagnosis for the specific event in the one year prior to cohort /SCRI entry. Persons with such acute diagnoses more than a year ago will be maintained to allow for subgroup analyses. Upon investigation of one event, we do not exclude any history or prevalence of other groups of events (AESIs).
• They have a contra-indicati

Age groups

Preterm newborn infants (0 – 27 days)
Term newborn infants (0 – 27 days)
Infants and toddlers (28 days – 23 months)
Children (2 to < 12 years)
Adolescents (12 to < 18 years)
Adults (18 to < 46 years)
Adults (46 to < 65 years)
Adults (65 to < 75 years)
Adults (75 to < 85 years)
Adults (85 years and over)

Estimated number of subjects

59000000
Study design details

Main study objective

The objective of the COVID-Vaccine Monitor study is to rapidly assess signals of potential safety concerns emerging from active surveillance and identified by PRAC.

Data analysis plan

Risk estimation: IRR
Documents
Results tables
English (512.3 KB - PDF)View document
English (589.48 KB - PDF)View document
Study, other information
English (1.3 MB - PDF)View document