Stories to Prevent (StoP) HPV Cancers

February 20, 2026 updated by: William Calo, Milton S. Hershey Medical Center

Stories to Prevent (StoP) HPV Cancers: A Communication Intervention to Increase HPV Vaccination Among Diverse Populations.

This randomized controlled trial (RCT) evaluates the association of a narrative communication intervention on human papillomavirus (HPV) vaccination rates among 9- to 12-year-olds. The intervention is a brief video from local cancer survivors narrating their stories with an HPV-related cancer diagnosis and recommending the HPV vaccine for cancer prevention. RCT participants will be the parents (n=200) of children ages 9-12 who have not initiated HPV vaccination. Participants will be randomized (1:1) to our intervention or control (placebo video) one week before their child's next primary care visit. Our primary outcome is HPV vaccine initiation (first dose of the HPV vaccine series) among children ages 9-12 at the time of the wellness visit. The study also explores the effect of narratives on theory-based mediators of HPV vaccination, including parents' cognitive (e.g., risk perception) and emotional reactions (e.g., hope, anticipated regret).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Despite the availability of the human papillomavirus (HPV) vaccine that can prevent over 37,300 HPV-related cancers in the US every year, only 62.6% of girls and boys were up-to-date in 2022. Low-quality provider recommendations and time constraints during clinic visits limit parents' opportunities to discuss and make HPV vaccination decisions. Pre-visit education to parents could complement provider communication to promote HPV vaccination. There is a critical need to identify better communication strategies to increase HPV vaccine uptake, including the use of narrative messaging and existing digital technologies in clinics and at home (electronic health records, patient portal, mobile devices). The Stories to Prevent (StoP) HPV Cancers Study is a randomized controlled trial (RCT) to evaluate the association of a narrative communication intervention delivered through digital and mobile technology before clinic visits on HPV vaccine initiation rates. A sample of 200 parents of unvaccinated children ages 9-12 will be randomized to receive our intervention or control (placebo video). Participants will be recruited from general pediatric and family medicine clinics affiliated with Penn State Health. We will also examine the effect of narrative communication on theory-based psychological mediators of HPV vaccine initiation and narrative communication processes, specifically parents' cognitive and emotional reactions.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
200

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Parent/guardian of a 9-12 year old receiving primary care at a Penn State Health clinic
  • Their child has not previously received or initiated the HPV vaccine
  • Is able to read and understand spoken English or Spanish
  • Has a valid email address and access to a mobile phone, table, desktop or laptop computer to engage in the intervention

Exclusion Criteria:

  • Parent of guardian is less than 18 years of age
  • Unable to read and understand spoken English or Spanish
  • Does not have access to a mobile phone, table, desktop or laptop computer

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: Health Services Research
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Cancer survivor narrative video
Parents randomly assigned to this arm will receive the video intervention using their personal devices around two weeks before their child's wellness visit. The video will be approximately 4 minutes in length with three parts: (1) Cancer experience, (2) Vaccine recommendation, and (3) Closing message.
Other: Cancer survivor narrative
The narrative video intervention has three parts: (1) Cancer experience - the cancer survivor narrates his/her experience with an HPV-related cancer, including diagnosis, treatment, and how cancer affected their personal life or family; (2) Vaccine recommendation - the cancer survivor provides brief information about the safety and effectiveness of the HPV vaccine and recommend that parents get the HPV vaccine for their child to prevent cancers; and (3) Closing message - The sentence "HPV vaccine is cancer prevention. Talk to your child's healthcare provider about getting the HPV vaccine during the next clinic visit" will appear on the screen.
Placebo Comparator: Placebo video
Parents randomly assigned to this arm will receive the placebo video using their personal devices around two weeks before their child's wellness visit. The placebo video is about healthy eating tips for families with children. The video will be approximately 4 minutes in length.
Other: Healthy eating tips
A publicly available video about healthy eating tips for families with children.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
HPV vaccine initiation, 9-12 year olds
Time Frame: One week after clinic visit
The proportion of children ages 9-12 who have initiated HPV vaccination (first dose) during their scheduled clinic visit.
One week after clinic visit

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
HPV vaccine initiation stratified by age
Time Frame: One week after clinic visit
The proportion of children ages 9-12 who have initiated HPV vaccination (first dose) by during their scheduled clinic visit stratified by age group (9-10 vs 11-12)
One week after clinic visit
HPV vaccine initiation stratified by sex
Time Frame: One week after clinic visit
The proportion of children ages 9-12 who have initiated HPV vaccination (first dose) during their scheduled clinic visit stratified by sex (male vs female)
One week after clinic visit
HPV vaccine initiation stratified by race/ethnicity
Time Frame: One week after clinic visit
The proportion of children ages 9-12 who have initiated HPV vaccination (first dose) during their scheduled clinic visit stratified by race/ethnicity (White, Black, Hispanic, Others)
One week after clinic visit
HPV vaccine communication in clinics
Time Frame: One week after clinic visit
Measure quality indicators of HPV vaccine recommendation, including the use of a presumptive announcement (i.e., noting the child's age, saying the child should get the vaccine today, using language that assumes the parent will accept the vaccine, focusing on disease prevention) and opportunities for the parent to voice concerns or questions and receive answers from the provider.
One week after clinic visit
Believability
Time Frame: One week after the intervention
Measure adapted from 12 items focusing on coverage, plausibility, completeness, and consistency with a 5-point scale (5=strongly agree to 1=strongly disagree)
One week after the intervention
Character identification
Time Frame: One week after the intervention
Measure adapted from 6 items that use a 5-point scale focusing on similarity (5=strongly agree to 1=strongly disagree)
One week after the intervention
Health beliefs
Time Frame: One week after the intervention
Measure adapted from 31 items focusing on risk susceptibility, severity, barriers, benefits, and self-efficacy rated on a 5-point scale (5=strongly agree to 1=strongly disagree)
One week after the intervention
Positive affect
Time Frame: One week after the intervention
Measure adapted from 3 items on hope using a 5-point scale (5=strongly agree to 1=strongly disagree)
One week after the intervention
Negative affect
Time Frame: One week after the intervention
Measure adapted from 9 items on negative affect using a 5-point scale (5=strongly agree to 1=strongly disagree)
One week after the intervention
Acceptability of digital health interventions
Time Frame: One week after the intervention
Measure adapted from 10 items to assess acceptability of digital health interventions using 5-point scale (5=strongly agree to 1=strongly disagree).
One week after the intervention

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Milton S. Hershey Medical Center

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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 18, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 30, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 31, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 29, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 4, 2025

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 5, 2025

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 24, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 20, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • STUDY00025798

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

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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