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Big brothers big sisters put to the test: can mentoring prevent crime?

NCT ID NCT03495635

Prevention Sponsor: University of Illinois at Chicago Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 whether the Big Brothers Big Sisters community mentoring program can prevent crime and delinquency in youth ages 10 to 16. Over 1,300 young people were randomly assigned to either get a mentor or not, and researchers tracked arrests, delinquency, and substance use for 4 years. The goal was to see if having a caring adult mentor reduces risky behaviors and helps kids stay on a positive path.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

1,361 people

The number who actually took part.

Started

Feb 2018

Finished

Jun 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.

Ages

10 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.

Inclusion criteria: * youth is 10 years of age or older * youth is likely to be eligible for the Big Brothers Big Sisters Community-Based Mentoring program as determined by initial assessment of program staff Exclusion criteria: * youth has a severe learning, cognitive or other intellectual disability as reported by the parent * parent does not both speak and read either English or Spanish * youth does not have a sibling who is already a study participant * youth has been matched with a Big Brother/Sister through one of the affiliate's programs in the past * youth has a sibling currently receiving services from the affiliate for whom services were initiated (i.e., inquiry was made) prior to start of the study * youth belongs to a group that the affiliate is excluding from study participation based on previous agreement with the research team * youth is designated as an exception case by affiliate staff (each affiliate will have the opportunity to exclude up to 4% of study-eligible youth from the research prior to consent and random assignment for any reason deemed appropriate (e.g., perceived high need of the youth))

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As listed by the trial registrant

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

CRIME Juvenile delinquency

Contacts and locations

Locations

  • University of Illinois at Chicago

    Chicago, Illinois, 60608, United States

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