NCT07217145

Brief Summary

This study will serve as one of the first to develop and test the effectiveness of strategies to promote HPV vaccination among diverse rural parents and caregivers of children ages 9-17 years in the Mountain West. Once implemented into practice, our intervention could significantly reduce disparities in the burden of HPV-associated cancers among rural populations in the United States. The proposed study will assess the effectiveness of clinic-based outreach to increase vaccination rates for HPV at four community clinics in rural counties in Washington. The proposed study includes the following a randomized controlled trial (RCT) that will assign adult parent/caregiver participants to a timeline for receiving intervention. This study will develop best practices, implementation guides, and dissemination of findings for other clinics to implement the program on a broader scale.

Trial Health

75
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
1,455

participants targeted

Target at P75+ for not_applicable

Timeline
2mo left

Started Oct 2025

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
active not recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress80%
Oct 2025Jul 2026

First Submitted

Initial submission to the registry

September 25, 2025

Completed
14 days until next milestone

Study Start

First participant enrolled

October 9, 2025

Completed
6 days until next milestone

First Posted

Study publicly available on registry

October 15, 2025

Completed
4 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

February 1, 2026

Completed
5 months until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2026

Expected
Last Updated

March 9, 2026

Status Verified

March 1, 2026

Enrollment Period

4 months

First QC Date

September 25, 2025

Last Update Submit

March 5, 2026

Conditions

Keywords

HumansAdolescentChildMaleFemaleCaregiversParentsHispanic or LatinoRural PopulationHealth PersonnelUnited StatesVaccinationPapillomavirus VaccinesPapillomavirus Vaccines / administration & dosageHuman Papillomavirus VirusesPapillomavirus InfectionsPapillomavirus Infections / prevention & controlCancer / prevention & controlIncidenceText MessagingReminder Systems / instrumentationSocial NormsHealth Knowledge, Attitudes, PracticeHealth Promotion / methodsMotivationCommunicationPatient Acceptance of Health CareParents / educationReligionReligiosityStakeholder ParticipationParticipatory ApproachQualitative ResearchQuantitative ResearchRandomized Control TrialSurveys and Questionnaires

Outcome Measures

Primary Outcomes (1)

  • Intervention Reach: Vaccination Next Step Initiation (Next HPV dose completion)

    The investigators will track intervention reach using the Proctor Implementation and RE-AIM frameworks. The primary outcome is whether patients initiate the next step in the HPV vaccination series at 6 months, which will be captured via the EHR and the state vaccine registry. Completing the next step in the vaccine series outcome will be compared via logistic generalized estimating equations (GEE) models, with bias-reduced robust sandwich variance estimators clustered by the clinic. These logistic GEEs will be adjusted for P/C and patient features that may influence the HPV vaccination series next step and completion, including age, sex, race/ethnicity, rurality, and HPV vaccination initiation status at study enrollment. Pre-defined subgroup analyses will be performed by P/C and/or patient sex, age group, race/ethnicity, rurality, and HPV vaccination initiation status at study enrollment, and each of these characteristics will be assessed for effect moderation.

    6 Months

Secondary Outcomes (3)

  • RCT Arm Effectiveness: Next HPV Vaccination Step Completion

    6 Months

  • Intervention Reach: Vaccination Next Step Initiation (Next HPV dose completion)

    13 Months

  • RCT Arm Effectiveness: Next HPV Vaccination Step Completion

    13 Months

Study Arms (3)

Automated Intervention (Auto)

EXPERIMENTAL

Auto intervention participants will be eligible for outreach delivered using automated phone calls, text, or email messages with the mode, frequency, timing of reminders, and message content. Automated outreach may also include innovative communication strategies, such as text-linked videos, P/C, or patient narratives. Auto outreach to P/C will invite P/Cs to attend free HPV vaccination visits and emphasize family-friendly hours.

Biological: PREVENT

Automated Intervention Plus (Auto-Plus)

EXPERIMENTAL

Auto-Plus intervention participants will be eligible for automated reminders, plus additional P/C prompts for patients who do not undergo vaccination within three weeks. These prompts may be delivered via live phone call outreach or patient navigation. Working with clinic leadership and previous research, activities will be selected from a list of possible options from the National HPV Vaccination Roundtable (previously chaired by Dr. Brewer) and our ranking of the effectiveness of language- and culturally- tailored intervention materials.

Biological: PREVENT

Usual Care (UC)

NO INTERVENTION

The UC group will not receive tailored reminders but will only receive opportunistic vaccine reminders that are delivered during clinic visits or MyChart EHR-based patient portal reminders.

Interventions

PREVENTBIOLOGICAL

The proposed study will assess the effectiveness of clinic-based outreach to increase vaccination rates for HPV at community clinics in rural counties.

Automated Intervention (Auto)Automated Intervention Plus (Auto-Plus)

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Parents/Caregivers (P/C) of children/adolescents (C/A) ages 9-17 years of age (i.e., age-eligible for HPV vaccination);
  • P/C with active clinic patients (i.e., have been seen in the clinic in the last 12 months); and
  • P/C who speak either English or Spanish.

You may not qualify if:

  • P/C of C/A with previous excluding HPV vaccination history (e.g., completed vaccination, or not due);
  • P/C of C/A with clinical conditions that influence the CDC HPV vaccination recommendations (e.g., pregnancy);
  • P/C of C/A with other factors that would influence CDC HPV recommendations; and
  • P/C that does not speak Spanish or English.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Sea Mar Community Health Centers

Seattle, Washington, 98108, United States

Location

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Related Links

MeSH Terms

Conditions

Papillomavirus InfectionsNeoplasmsBehaviorCommunicationPatient Acceptance of Health Care

Condition Hierarchy (Ancestors)

Sexually Transmitted Diseases, ViralSexually Transmitted DiseasesCommunicable DiseasesInfectionsDNA Virus InfectionsVirus DiseasesTumor Virus InfectionsGenital DiseasesUrogenital DiseasesDisease AttributesPathologic ProcessesPathological Conditions, Signs and SymptomsTreatment Adherence and ComplianceHealth Behavior

Study Officials

  • Deanna Kepka, PhD, MPH

    University of Utah

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
PARTICIPANT, CARE PROVIDER
Masking Details
Clinic analysts will create a real-time list of patients due for an initial HPV vaccine dose. P/C of remaining C/A patients will be individually randomized to either Auto or Auto-Plus intervention or usual care (UC) in a 1:1:1 ratio. The PREVENT study will only target one child/adolescent per parent/caregiver (siblings will be excluded from intervention assessments). The investigators will use automated codes to manage interventions so that eligible patients get initial HPV vaccines on time and P/C are prompted to repeat vaccination, as recommended. The investigators will select a cohort of approximately 1,038 P/C patients from the 4 clinics, randomized to intervention arms (UC, Auto, and Auto-Plus). Intervention activities largely mimic clinic processes, and clinicians and participants will be unaware of which intervention study arm the P/C has been assigned.
Purpose
PREVENTION
Intervention Model
SEQUENTIAL
Model Details: The investigators will use intervention mapping (IM) to plan each intervention step. The investigators will apply IM to develop and test HPV vaccination reminders for parents/caregivers (P/C). Intervention: The investigators propose a 3-arm RCT to compare rates of completing the next step in the HPV vaccination series at six months and completing the HPV vaccination series at 13 months between Auto, Auto-Plus, and UC arms. P/C of children/adolescents (C/A) who have not initiated and/or not completed the series will be randomized 1:1:1 to study arms. Participants will be assessed for eligibility and enrolled, with a total participant time in the study of 13 months, for a total of 25 months of enrollment, participation, and follow-up.
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

September 25, 2025

First Posted

October 15, 2025

Study Start

October 9, 2025

Primary Completion

February 1, 2026

Study Completion (Estimated)

July 1, 2026

Last Updated

March 9, 2026

Record last verified: 2026-03

Locations