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Do school safety measures prevent shootings? new study investigates

NCT ID NCT05552716

Knowledge-focused Sponsor: Columbia University Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at over 650 U.S. public schools to see if safety tactics like metal detectors, security guards, and emergency drills actually prevent intentional shootings. Researchers also checked whether these measures lead to more student suspensions or expulsions. The goal is to help schools make informed decisions about keeping students safe without unfairly punishing them.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

648 people

The number who actually took part.

Started

May 2023

Finished

Jan 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The large majority of data collected in this proposed study does not involve human subjects. Nearly all (if not all) data collected in this study will be publicly available. In the case that a school's safety plan for a specific academic year of interest is not available online, the MPIs will email the principal of the school directly to inquire if they would be willing to provide a copy of the safety plan for the purpose of this research study. As a result, the principal of every participating school in this proposed work will be eligible for participation.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

For a case school to be included, it must satisfy the following criteria: Inclusion Criteria- 1. The incident must have taken place on the school property. 2. The gun must have been shot during school hours. Exclusion Criteria: 1. The shot was accidental. 2. If it was a suicide/attempted suicide and there was no attempt to shoot another person. (Murder-suicides will be included.) 3. The shot was fired on the school bus on its way to or from the school or another school-sanctioned event. 4. The school was not in session for any reason. 5. The school event was taking place at a location where school security measures were ineffective. 6. The shot originated from outside the school and no person or property was hit in the school. Inclusion criteria for control school: Matches the case school on the following criteria- geographic state, urban/non-urban, and elementary/middle/high school status.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Violence

Contacts and locations

Locations

  • Columbia Mailman School of Public Health

    New York, New York, 10032, United States

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