Collaboration and Survey Revision

Delphi continues to revise the COVID-19 Trends and Impact Survey (CTIS) instruments in order to prioritize items that have the greatest utility for the response to the COVID-19 pandemic. We conduct revisions in collaboration with data users, fellow researchers, and public health officials, to ensure the survey data best serves public health and research goals.

Proposing Revisions

If there is a revision or question you would like us to consider, please fill out this form requesting details about your proposal. This request can be submitted by researchers regardless of whether they have a signed Data Use Agreement for the individual responses to the COVID-19 Trends and Impact Survey.

Collaboration Meetings

Collaboration in this ongoing effort is our priority. Delphi hosts a collaboration meeting the first Friday of each month at 2–3pm ET. The meeting is a chance to announce upcoming changes to the survey, have a discussion and get input about the instrument, share preliminary findings and network with other researchers.

If you’re interested in joining, contact us at