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Study of an Investigational Vaccine in Pre-Adolescents and Adolescents (Gardasil)(V501-016)

A Study to Demonstrate Immunogenicity and Tolerability of Gardasil (V501) Quadrivalent HPV (Types 6, 11, 16, 18) L1 Virus-Like Particle (VLP) Vaccine in Preadolescents, and To Determine End-Expiry Specifications for the Vaccine

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00092495
Enrollment
3055
Registered
2004-09-27
Start date
2002-12-31
Completion date
2009-02-28
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cervical Cancer, Genital Warts

Brief summary

The primary purpose of the study is to determine if an investigational vaccine Gardasil (V501) with 4 components will provide an immune response and will be well tolerated in pre-adolescents and adolescents.

Interventions

BIOLOGICALV501, Gardasil, human papillomavirus (type 6, 11, 16, 18) recombinant vaccine

qHPV Vaccine (20, 40, 60 or 100% dose formulation) 0.5 mL intramuscular injection given at Day 1, Month 2 and Month 6.

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
10 Years to 23 Years
Healthy volunteers
Yes

Inclusion criteria

* Healthy adolescents and pre-adolescents with no prior sexual history * Healthy women who have an intact uterus with lifetime history of 0-4 sexual partners

Exclusion criteria

* Prior Human Papillomavirus (HPV) vaccination * Prior abnormal Paps * Prior history of genital warts

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 6 titer ≥ 20 milliMerck units per milliliter (mMU/mL).
Geometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)
Number of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 11 titer ≥ 16 milliMerck units per milliliter (mMU/mL).
Geometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)
Number of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)Seropositivity is defined as an anti-HPV 16 titer ≥ 20 milliMerck units per milliliter (mMU/mL). Seroconversion is defined as going from seronegative to seropositive.
Geometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)
Number of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 18 titer ≥ 24 milliMerck units per milliliter (mMU/mL).
Geometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3Week 4 Postdose 3 (Month 7)

Participant flow

Participants by arm

ArmCount
20% Formulation qHPV Vaccine
Subjects in this group received a 20% dose formulation of the quadrivalent human papillomavirus (qHPV) vaccine at Day 1, Month 2, and Month 6.
504
40% Formulation qHPV Vaccine
Subjects in this group received a 40% dose formulation of the qHPV vaccine at Day 1, Month 2, and Month 6.
514
60% Formulation qHPV Vaccine
Subjects in this group received a 60% dose formulation of the qHPV vaccine at Day 1, Month 2, and Month 6
508
100% Formulation qHPV Vaccine
Subjects in this group received a 100% dose formulation of the qHPV vaccine at Day 1, Month 2, and Month 6.
1,529
Total3,055

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Base Study Follow-up PeriodExtended00120
Base Study Follow-up PeriodLost to Follow-up133120
Base Study Follow-up PeriodWithdrawal by Subject20000
Base Study Vaccination PeriodAdverse Event10030
Base Study Vaccination Period*Clinical AE10120
Base Study Vaccination PeriodExtended00010
Base Study Vaccination PeriodLost to Follow-up16611360
Base Study Vaccination PeriodMoved31220
Base Study Vaccination PeriodOther11020
Base Study Vaccination Period*Other reasons10010
Base Study Vaccination PeriodParent Withdrew Consent11150
Base Study Vaccination PeriodPregnancy20000
Base Study Vaccination Period*Pregnancy02570
Base Study Vaccination PeriodProtocol Violation10000
Base Study Vaccination PeriodRandomized Not Vaccinated11040
Base Study Vaccination PeriodWithdrawal by Subject91014250

Baseline characteristics

CharacteristicTotal40% Formulation qHPV Vaccine20% Formulation qHPV Vaccine60% Formulation qHPV Vaccine100% Formulation qHPV Vaccine
Age, Continuous15.7 years
FULL_RANGE 10
16.5 years16.2 years16.2 years15.1 years
Age, Customized
10 to 11 Years of Age
528 participants77 participants75 participants74 participants302 participants
Age, Customized
12 to 13 Years of Age
676 participants95 participants110 participants101 participants370 participants
Age, Customized
14 to 15 Years of Age
571 participants83 participants67 participants77 participants344 participants
Age, Customized
16 to 17 Years of Age
176 participants24 participants40 participants35 participants77 participants
Age, Customized
18 to 19 Years of Age
316 participants62 participants58 participants71 participants125 participants
Age, Customized
20 to 21 Years of Age
434 participants86 participants90 participants93 participants165 participants
Age, Customized
22 to 23 Years of Age
353 participants86 participants64 participants57 participants146 participants
Age, Customized
Over 23 Years of Age
1 participants1 participants0 participants0 participants0 participants
Sex: Female, Male
Female
2545 Participants514 Participants504 Participants508 Participants1019 Participants
Sex: Female, Male
Male
510 Participants0 Participants0 Participants0 Participants510 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —
other
Total, other adverse events
434 / 496426 / 509431 / 5001,276 / 1,498
serious
Total, serious adverse events
5 / 4962 / 5091 / 5004 / 1,498

Outcome results

Primary

Geometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: : Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3632.1 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3804.7 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3836.2 mMU/mL
100% Formulation qHPV VaccineGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 31003.2 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 31264.0 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 31396.5 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 11 by Week 4 Postdose 3739.2 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 34848.8 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 35923.0 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 32753.0 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 32401.1 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 32963.3 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 33105.3 mMU/mL
100% Formulation qHPV VaccineGeometric Mean Titer (GMT) for HPV 16 by Week 4 Postdose 33824.6 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3544.0 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3640.4 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3647.5 mMU/mL
100% Formulation qHPV VaccineGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3696.9 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3953.6 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 31232.9 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 18 by Week 4 Postdose 3470.5 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3584.2 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3704.5 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3707.5 mMU/mL
100% Formulation qHPV VaccineGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3798.4 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Geometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3

Time frame: Week 4 Postdose 3 (Month 7)

Population: : Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureValue (GEOMETRIC_MEAN)
Girls 10-15 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3987.3 mMU/mL
Boys 10-15 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 31116.1 mMU/mL
Women 16-23 YearsGeometric Mean Titer (GMT) for HPV 6 by Week 4 Postdose 3603.0 mMU/mL
p-value: <0.001ANOVA
p-value: <0.001ANOVA
Primary

Number of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 11 titer ≥ 16 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL423 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL428 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL320 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 11 titer ≥ 16 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL373 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL391 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL364 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL1 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 ≥ 16 mMU/mL743 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 11 by Week 4 Postdose 3HPV 11 < 16 mMU/mL0 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3

Seropositivity is defined as an anti-HPV 16 titer ≥ 20 milliMerck units per milliliter (mMU/mL). Seroconversion is defined as going from seronegative to seropositive.

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL424 mMU/mL
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 mMU/mL
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL427 mMU/mL
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 mMU/mL
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL306 mMU/mL
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 mMU/mL
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 16 titer ≥ 20 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL365 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL375 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL364 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL1 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 ≥ 20 mMU/mL730 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 16 by Week 4 Postdose 3HPV 16 < 20 mMU/mL0 Subjects
p-value: <0.01Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 18 titer ≥ 24 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL426 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL428 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL1 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL337 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL3 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 18 titer ≥ 24 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL381 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL1 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL3 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL403 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL375 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL4 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 ≥ 24 mMU/mL763 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 18 by Week 4 Postdose 3HPV 18 < 24 mMU/mL3 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 6 titer ≥ 20 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to subjects receiving 100% dosage.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL423 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL428 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL320 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
Primary

Number of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3

Seroconversion is defined as going from seronegative to seropositive. Seropositivity is defined as an anti-HPV 6 titer ≥ 20 milliMerck units per milliliter (mMU/mL).

Time frame: Week 4 Postdose 3 (Month 7)

Population: Per-protocol population: subjects must have no major protocol violations, must be seronegative at baseline to the relevant HPV type, and must have post-vaccination data. Restricted to female subjects 10-15 years and 16-23 years.

ArmMeasureGroupValue (NUMBER)
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL372 Subjects
Girls 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
Boys 10-15 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL391 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL363 Subjects
Women 16-23 YearsNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL1 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 ≥ 20 mMU/mL743 Subjects
100% Formulation qHPV VaccineNumber of Subjects Who Seroconverted for HPV 6 by Week 4 Postdose 3HPV 6 < 20 mMU/mL0 Subjects
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen
p-value: <0.001Miettinen and Nurminen

Source: ClinicalTrials.gov · Data processed: Apr 3, 2026