An Extended Follow-Up Study of the HPV Vaccine Delayed Bo... | NCT04688476

Studies
An Extended Follow-Up Study of the HPV Vaccine Delayed Booster Trial

NCT04688476

Sponsor

University of Arizona

Status

Active, not recruiting

Last Update Posted

Oct 16, 2025Actual

Enrollment

113Actual

Phase

Not provided

Conditions

HPV-associated Cancer

Interventions

Not provided

Countries

United States

Protocol Section

Identification Module Status Module Sponsor/Collaborators Module Oversight Module Description Module Conditions Module Design Module Arms/Interventions Module Outcomes Module Eligibility Module Contacts/Locations Module References Module IPD Sharing Statement Module

Results Section

Participant Flow Module Baseline Characteristics Module Outcome Measures Module Adverse Events Module More Info Module

Annotation Section

Annotation Module

Document Section

Large Document Module

Derived Section

Miscellaneous Info Module Condition Browse Module Intervention Browse Module

Protocol Section

Identification Module

NCT ID

Results Section

No data available

No data is available for this block.

Annotation Section

No data available

No data is available for this block.

Document Section

No data available

No data is available for this block.

Derived Section

Miscellaneous Info Module

Version Holder

ID	Type	Description	Link
UG1 242596	Other Grant/Funding Number	DCP

Status Module

Record Verification Date

Sep 2025

Overall Recruitment Status or Expanded Access Status

Active, not recruiting

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Nov 17, 2020Actual

Primary Completion Date

Sep 9, 2025Actual

Completion Date

Dec 2025Estimated

First Submitted Date

Dec 17, 2020

First Submission Date that Met QC Criteria

Dec 23, 2020

First Posted Date

Dec 30, 2020Actual

Results Waived

Not provided

Results First Submitted Date

Not provided

Results First Submitted that Met QC Criteria

Not provided

Results First Posted Date

Not provided

Certification/Extension (aka Delayed Results) First Submitted Date

Not provided

Certification/Extension First Submitted that Passed QC Review

Not provided

Certification/Extension First Posted Date

Not provided

Last Update Submitted Date

Oct 14, 2025

Last Update Posted Date

Oct 16, 2025Actual

Name	Class
National Cancer Institute (NCI)	NIH
University of California, Los Angeles	OTHER

Oversight Module

Has Data Monitoring Committee (DMC)

Is FDA Regulated Drug

Is FDA Regulated Device

Is Unapproved Device

Not provided

Pediatric Postmarket Surveillance of a Device Product

Not provided

Product Exported from US

FDAAA801 Violation

Not provided

Description Module

Brief Summary

This is an extended follow-up study to follow-up study participants who received 1 booster dose of Gardasil 9 in the "HPV vaccine delayed booster trial." This was a prospective, single-arm, open-label, non-randomized, phase IIa trial among 9-11 year-old girls and boys to determine the immunogenicity after a single dose of the nonavalent HPV vaccine (Gardasil 9) over 24 months, with a delayed booster dose at 24 months and an optional booster at 30 months after the first dose. Participants provided blood specimens at 6, 12, 18, 24, and 30 months after the first dose. Serologic geometric mean titers (GMT) of the nine vaccine types (HPV 16/18/ 6/11/31/33/45/52/58) were measured at each time point. One hundred and thirty-three (133) participants received one booster dose at month 24 and elected not to receive the second booster at month 30.

For this follow-up study, we anticipate that we will be able to accrue 120 participants from the original study who received just one booster dose. Participants who received one booster dose of Gardasil 9 will be contacted to return to the clinic to provide blood specimens at 48 (±3), 60 (±3), and 72 (±3) months after the priming dose. Serologic geometric mean titers (GMT) of the nine vaccine types (HPV 16/18/ 6/11/31/33/45/52/58) will be measured at each time point.

Detailed Description

Not provided

Design Module

Study Type

Observational

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Target Follow-Up Duration

Not provided

Phases

Not provided

Interventional Study Design

Allocation

Not provided

Intervention Model

Biospecimen

Retention

Enrollment

113Actual

Outcomes Module

Primary Outcomes

Measure	Description	Time Frame
The differences in geometric mean titer (GMT) of HPV 16 and HPV18 between 30 vs. 48, 48 vs. 60, and 60 vs. 72 months after the priming dose of Gardasil		72 months

Secondary Outcomes

Measure	Description	Time Frame
The differences in geometric mean titer of other HPV types (HPV6/11/31/33/45/52/58) between 30 vs. 48, 48 vs. 60, and 60 vs. 72 months after the priming dose of Gardasil 9		72 months

Other Outcomes

Not provided

Eligibility Module

Eligibility Criteria

Inclusion Criteria:

Study participants who received one booster dose of Gardasil 9 at month 24 and elected not to receive the second booster at month 30 in the original "HPV vaccine delayed booster trial"
Ability to understand and the willingness to sign a written informed consent document by the legal representative(s) of the participant.
Ability to understand and the willingness to sign a written assent document by the participant.

Exclusion Criteria:

- Has received any HPV vaccine dose from an external source at any point during or after participation in the HPV vaccine delayed booster trial.

Accepts Healthy Volunteers

Yes

Sex

All

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

Not provided

Maximum Age

Not provided

Standard Ages

ChildAdultOlder Adult

Study Population

Study population is restricted to study participants who received one booster dose of Gardasil 9 at month 24 and elected not to receive the second booster at month 30 in the original "HPV vaccine delayed booster trial".

Sampling Method

Non-Probability Sample

Contacts/Locations Module

Central Contacts

Not provided

Overall Officials

Not provided

Locations

Facility	Status	City	State	ZIP	Country	Contacts
University of Arizona		Tucson	Arizona	85724	United States
University of California, Los Angeles

IPD Sharing Statement Module

Plan to Share IPD

Description

Not provided

Types

Not provided

Time Frame

Not provided

Access Criteria

Not provided

URL

Not provided

Description

Blood serum will be collected at each visit for Serologic geometric mean titers (GMT) of the nine vaccine types (HPV 16/18/ 6/11/31/33/45/52/58).

Urine will be collected at each visit to explore the potential of assessing HPV DNA and antibodies in the urine.