Evaluation of Peer Group Connection - Middle School (PGC-MS)

May 13, 2026 updated by: The Policy & Research Group

Evaluation of Peer Group Connection - Middle School (PGC-MS)

This study is a randomized controlled trial to assess the impact of the Peer Group Connection - Middle School (PGC-MS) intervention on pre-sexual behaviors and sexual initiation in middle school-aged youth. The primary research questions it aims to answer are:

  1. What is the impact of the offer to participate in PGC-MS relative to the control group on participants' reported initiation of sexual intercourse at sixteen months post-intervention?
  2. What is the impact of the offer to participate in PGC-MS relative to the control group on participants' reports of ever smoking a cigarette at four months post-intervention?
  3. What is the impact of the offer to participate in PGC-MS relative to the control group on participants' reports of ever using an electronic vapor product at four months post-intervention?
  4. What is the impact of the offer to participate in PGC-MS relative to the control group on participants' reports of ever having a drink of alcohol at four months post-intervention?
  5. What is the impact of the offer to participate in PGC-MS relative to the control group on participants' reports of ever using marijuana at four months post-intervention?

Researchers will compare participants randomized to receive PGC-MS (treatment group) to participants randomized to class-as-usual (which contains no sexual or reproductive health information (control group)).

Participants randomized to the treatment group will be offered PGC-MS over the course of their transition year into middle school (6th grade). Participants randomized to the control group will be offered class-as-usual.

Study Overview

Detailed Description

This is an individual-level, randomized control trial to rigorously evaluate the impact of the Peer Group Connection - Middle School (PGC-MS) intervention. Participant outcomes will be assessed using self-reported, individual-level data gathered using a structured questionnaire administered at four time points: baseline (fall semester of 6th grade); post-intervention (spring semester of 6th grade); four months post-intervention (fall semester of 7th grade); and sixteen months post-intervention (fall semester of 8th grade).

Study Type

Interventional

Enrollment (Estimated)

1400

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Be enrolled at a middle school participating in the study
  • Entering the middle school transition grade for the first time (6th or 7th grade depending on the middle school transition year) at a participating study school
  • Provide parental consent and student assent to participate in the study
  • Have the ability to complete a self-administered questionnaire in either English or Spanish in a classroom or group setting, unassisted, in 60 minutes or less.

Exclusion Criteria:

- Repeating the middle school transition year (6th or 7th grade)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Peer Group Connection - Middle School (PGC-MS)
Peer Group Connection - Middle School (PGC-MS) is the treatment condition. PGC-MS is a school-based positive youth development program for students entering the transition year into middle school (6th or 7th grade). PGC-MS aims to improve school engagement and social-emotional learning skills that support adolescent health and educational outcomes for program participants. Participants receive 40-minute outreach sessions held 3 to 4 times per month for the full school year. Schools are expected to implement a minimum of 18 outreach sessions over the school year. PGC-MS outreach sessions are delivered by older peer leaders (8th, 9th, or 10th graders) who are carefully selected by faculty advisors and trained on how to deliver program content.
No Intervention: Class as usual

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Initiation of sexual intercourse
Time Frame: Assessed 16 months after the intervention period has ended (beginning of the second fall semester following the end of the program)
Participants are asked the following item: Have you ever had sexual intercourse?. The resulting variable is dichotomous with values 0 or 1, where 0 indicates a person who has never had sexual intercourse and 1 indicates a person who has had sexual intercourse.
Assessed 16 months after the intervention period has ended (beginning of the second fall semester following the end of the program)
Ever smoked a cigarette
Time Frame: Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Description: Participants are asked the following item: Have you ever smoked a cigarette, even one or two puffs?. The resulting variable is dichotomous with values 0 or 1, where 0 indicates a person who has never smoked a cigarette and 1 indicates a person who has smoked a cigarette.
Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Ever used an electronic vapor product
Time Frame: Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Participants are asked the following item: Have you ever used an electronic vapor product?. The resulting variable is dichotomous with values 0 or 1, where 0 indicates a person who has never used an electronic vapor product and 1 indicates a person who has used an electronic vapor product.
Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Ever had a drink of alcohol
Time Frame: Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Participants are asked the following item: Have you ever had a drink of alcohol?. The resulting variable is dichotomous with values 0 or 1, where 0 indicates a person who has never had a drink of alcohol and 1 indicates a person who has had a drink of alcohol.
Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Ever used marijuana
Time Frame: Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)
Participants are asked the following item: Have you ever used marijuana?. The resulting variable is dichotomous with values 0 or 1, where 0 indicates a person who has never used marijuana and 1 indicates a person who has used marijuana.
Assessed 4 months after the intervention period has ended (beginning of the first fall semester following the end of the program)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 1, 2024

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

September 14, 2028

Study Registration Dates

First Submitted

August 30, 2024

First Submitted That Met QC Criteria

August 30, 2024

First Posted (Actual)

September 3, 2024

Study Record Updates

Last Update Posted (Actual)

May 18, 2026

Last Update Submitted That Met QC Criteria

May 13, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • 1 TP2AH000083-01-00

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

A dataset will be prepared at the conclusion of the study, which includes de-identified individual-level data on all study participants who contributed self-report data. Respondents will be represented only by a research ID number. Included in the dataset will be self-report data collected across all survey administrations (including demographic characteristics, sexual behaviors, and theoretical antecedents to those behaviors) and select information on program participation (e.g., which program components were completed). Basic data cleaning steps will be taken in order to ensure data are unidentifiable and to increase usability.

IPD Sharing Time Frame

The individual participant dataset will become available twelve months after the study has concluded.

IPD Sharing Supporting Information Type

  • SAP

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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