Clinical trialNCT04506528CompletedObservational

COVID EHR COHORT at the University of Wisconsin

SponsorUniversity of Wisconsin, MadisonEnrollment1,634,381COVID-19CancerCardiovascular DiseasesImmunosuppression DisordersNicotine DependencePulmonary Disease

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This cohort study will obtain electronic health record (EHR) data (limited data set) from 21 health systems affiliated with the Cancer Center Cessation Initiative (C3I) network or health systems with large numbers of COVID-19 patients to explore whether smoking status, cancer history, and other risk factors among patients diagnosed with COVID-19 are associated with mortality and/or COVID-19 disease severity/complications. Each site will provide data from their health system EHR on a regular basis that includes all patients identified as having COVID-19 at some point in the interval from February 1, 2020, through January 31, 2022.

clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a FindMyKOL profile link to it; the rest are shown as registered.

Betsy Rolland, PhD, MLIS, MPH
University of Wisconsin, Madison
Principal Investigator
clinicaltrials.gov ↗
Karen L Conner, MPH
University of Wisconsin, Madison
Study Director
clinicaltrials.gov ↗
Michael C Fiore, MD, MPH, MBA
University of Wisconsin, Madison
Principal Investigator
clinicaltrials.gov ↗

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

1 registered facility, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

University of Wisconsin School of Medicine and Public Health Center for Tobacco Research and Intervention
Madison, Wisconsin, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

No drug or biological interventions are in our data for this study. It may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 11 Jun 2020
Primary completion: 31 Jan 2022
Completion: 31 Jan 2022
Last update posted: 31 Aug 2022
Registered enrollment: 1,634,381
Registry id: NCT04506528

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 4 Nov 2026. Registry facts are shown as registered by the study sponsor; FindMyKOL does not interpret them.