Core Data Elements

The COVID-19 Immunity Task Force (CITF) and its Field Studies Working Party have developed a standardized list of core data elements that must be integrated into surveys conducted by CITF-funded groups across Canada studying issues related to COVID-19 immunity.

CITF encourages the Canadian community of academic researchers, public health leaders, and staff in national health agencies to use the standardized CORE Data Elements to inform the development of new surveys or the revision of existing surveys.

Survey module

Questions asked by Statistics Canada and other surveys used by national organizations formed the basis for the survey core data elements document, which aims to encourage groups to acquire and record survey data in a standardized manner.


Specifically, the core data elements include questions and responses related to COVID-19 status, COVID-19 symptoms, housing, risk factors, risk acquisitions, and health behaviours related to the virus as well as other areas of inquiry. The purpose of this list of core data elements is to ensure that gathered data is both useful on its own and is directly comparable between different COVID-19 studies and initiatives across Canada.

Lab results

Likewise, a standardized reporting module for serological assays was developed. As much as possible, given the evolving pandemic, international standard coding schemes are used.

Current version – Release date Feb 24, 2021

Version number Modules Major changes
2.0 Cross-Sectional Survey (Excel format / Questionnaire format) – response option “prefer not to answer” added to most items
– symptoms concurrent with each COVID-19 antigen test results
– includes vaccine questions
  Lab Reporting for Serologic Assay Results – new module

Previous versions

Version number Release date Modules
1.0 December 2020 – vaccine (Word/pdf)
  July 2020 – Cross-sectional survey (Word/pdf)

Webinar: Sharing your COVID-19 data with the CITF

This webinar presentation looks at the benefits of sharing COVID-19 data, outlines how to share your (meta)data with the CITF, and gives details as to how to deal with data & data governance.

webinar: sharing your Covid-19 data with the citf Watch the webinar given by David Buckeridge on November 27, 2020

Informed Consent Guidance

These documents outline the Minimum Required Consent Elements for contributing studies funded by the CITF as well as for external studies that intend to contribute data to the CITF database. It also includes the CITF Model Informed Consent Form, which explains the CITF database and its intended data use and data sharing practices.

Prospective consent guidance retrospective consent guidance

Data Sharing Guidance

This guide is intended to describe and facilitate the process of data centralization and data sharing with the CITF.

Quick Guide on Data Sharing – Funded Studies Data Sharing Agreement