HARMONIZATION OF DATA AND CORE DATA ELEMENTS
Data collected in a standard manner are easier to harmonize, which is a necessary step before analyzing and directly comparing data across multiple studies. To facilitate harmonization and enable the timely use of data from CITF-supported studies, researchers are asked to use Core Data Elements (CDE): a set of standard questions and immunology measures developed by the CITF Secretariat. The CDE have been updated periodically over the course of the pandemic.
Questionnaires for participants
The CDE include questions related to demographics and housing, COVID-19 status, symptoms, risk factors and health behaviours, and vaccination. Questions were based on those asked by Statistics Canada and other national organizations. Our goal was to encourage groups to acquire and record data in a manner consistent with health and social surveys.
Laboratory data reporting
The CDE also include standard reporting formats for serological and cell-mediated immunity assays. Formats were based on international standard coding schemes as much as possible.