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NCT04644328 · ClinicalTrials.gov registry record · NA

The Doctors for Coronavirus Prevention Project Thanksgiving / Christmas Messaging Campaign

A NA study of COVID-19, sponsored by National Bureau of Economic Research.

Completed
Registry status
NA
Development phase
820
Enrollment target
1
Study location

NCT04644328: Completed NA study of COVID-19, sponsored by National Bureau of Economic Research.

NCT04644328 is a NA study of COVID-19 that has completed, run by National Bureau of Economic Research. The registered enrollment target is 820 participants, below the 38,462-participant average among 298 other COVID-19 trials with a reported enrollment target (98% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.

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The verdict

NCT04644328, a NA study of COVID-19, has completed, sponsored by National Bureau of Economic Research.

COMPLETED
Registry status
NA
Development phase
820 participants
Enrollment target
1
Study location

Study Summary

Facebook ads with physician-delivered videos were shown before the Thanksgiving and Christmas holidays and focused on staying safe during the COVID pandemic by limiting travel and mask-wearing.

Primary Outcome

The change in movement metric is the percent change in distance covered in a day compared to the same day of the week in the benchmark period of February 2-29, 2020, by people who started the day in a particular location. We define holiday travel as travel during the three days preceding each holiday, since the available data does not allow us to compute the impact of the intervention on the return travel (after the holiday). The reason is that the mobility data describes the behavior throughout

Conditions Studied

Interventions

  • BEHAVIORAL Facebook Ads on the importance of staying safe during the Thanksgiving / Christmas holiday

Study Locations (1)

Massachusetts

  • JPAL North America - Cambridge

Trial Details

FieldValue
Enrollment Target 820 participants
Start Date 2020-11-12
Est. Completion 2021-02-11
Phase NA

What the finished NCT04644328 record still lists

NCT04644328 is an interventional study that assigns participants to a tested intervention. The registered 820 participants enrollment target is mid-sized for trials with a published cap, below the 38,462-participant average among 298 other COVID-19 trials with a reported enrollment target (98% lower).

The record links to 1 condition, with COVID-19 appearing as the primary indexed condition, and to 1 intervention - of which Facebook Ads on the importance of staying safe during the Thanksgiving / Christmas holiday is the first listed.

NCT04644328 reports a single indexed study location in Massachusetts.

Frequently Asked Questions

What is clinical trial NCT04644328 about?

NCT04644328 is a clinical study titled "The Doctors for Coronavirus Prevention Project Thanksgiving / Christmas Messaging Campaign". Facebook ads with physician-delivered videos were shown before the Thanksgiving and Christmas holidays and focused on staying safe during the COVID pandemic by limiting travel and mask-wearing.

What is the current status of trial NCT04644328?

This trial is currently completed. It is a NA study. The enrollment target is 820 participants. The study started on 2020-11-12. Estimated completion is 2021-02-11.

What conditions does trial NCT04644328 study?

This clinical trial studies the following conditions: COVID-19.

What interventions are being tested in trial NCT04644328?

The interventions under investigation include: Facebook Ads on the importance of staying safe during the Thanksgiving / Christmas holiday (BEHAVIORAL).

Who is sponsoring clinical trial NCT04644328?

This trial is sponsored by National Bureau of Economic Research, which has 14 total clinical trials registered on ClinicalTrials.gov.

Where is trial NCT04644328 being conducted?

This trial has 1 study location across Massachusetts. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.

Similar trials for COVID-19

Matched on the same primary condition, ranked to surface studies in the same phase first, then by recruiting status, no relevance scoring or editorial curation.

Where NCT04644328's enrollment target sits among peer trials

820 87th of 298 higher than 211 of 298 other COVID-19 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other COVID-19 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

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Source: ClinicalTrials.gov NCT04644328, the US trial registry maintained by the National Library of Medicine. NCT04644328 (mid enrollment · single site footprint · completed) retrieved and formatted by PlainTrial, see methodology.