Contingency Tables

This documentation describes the fine-resolution contingency tables produced by grouping US COVID-19 Trends and Impact Survey (CTIS) individual responses by various self-reported demographic features. The contingency tables are publicly available for download as a complete set from the Inter-university Consortium for Political Science Research (ICPSR):

• Reinhart, Alex, Mejia, Robin, and Tibshirani, Ryan J. COVID-19 Trends and Impact Survey (CTIS), United States, 2020-2022. Inter-university Consortium for Political and Social Research [distributor], 2025-02-28. https://doi.org/10.3886/ICPSR39207.v1

Select the dataset “DS0 Study-Level Files” to download the complete set of contingency tables and all survey documentation files, including the codebooks and an Aggregate Contingency Table User Guide that describes the data processing and file formats, and includes example R code.

These contingency tables provide granular breakdowns of COVID-related topics such as vaccine uptake and acceptance. Compatible tables are also available for the UMD Global CTIS for more than 100 countries and territories worldwide, also through ICPSR.

These tables are more detailed than the coarse aggregates reported in the COVIDcast Epidata API, which are grouped only by geographic region. Individual response data for the survey is available, but only to researchers who request restricted data access via ICPSR, whereas these contingency tables are available to the general public.

Please see our survey credits and citation information for information on how to cite this data if you use it in a publication.

Our Data and Sampling Errors documentation lists important updates for data users, including corrections to data or updates on data processing delays.