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Immunogenicity and Safety of BoostrixTM Using a New Syringe in 10 to 15-year Old Adolescents

Immunogenicity and Safety Study of GSK Biologicals' Boostrix™ Vaccine Using a New Syringe Presentation in Healthy Adolescents Aged 10-15 Years

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01362322
Enrollment
671
Registered
2011-05-30
Start date
2011-07-01
Completion date
2012-09-03
Last updated
2018-08-10

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

Conditions

Acellular Pertussis, Diphtheria, Tetanus

Keywords

dTpa, Boostrix

Brief summary

The purpose of the study is to compare the immunogenicity and safety of a booster dose of BoostrixTM administered in a new syringe presentation to that of BoostrixTM administered in the previous syringe presentation in healthy adolescents aged 10-15 years.

Detailed description

The protocol has been updated following Protocol amendment 1 date 03 August 2011 leading to the update of the exclusion criteria to allow subjects in Mexico to receive the flu vaccine in accordance with the local standard of care. The protocol has been updated following Protocol amendment 2 dated 14 December 2011 due to the recruitment constraints as a result of the DT/dTpa vaccination campaign in the countries. The inclusion and exclusion criteria were amended to allow the participation of those who have already received the 6th dose of the diphtheria, tetanus and/or pertussis containing vaccine.

Interventions

BIOLOGICALBoostrix TM (new syringe presentation)

Single dose, intramuscular administration in a new syringe presentation

BIOLOGICALBoostrix TM (previous syringe presentation)

Single dose, intramuscular administration in previous syringe presentation

Sponsors

GlaxoSmithKline
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
SINGLE (Subject)

Eligibility

Sex/Gender
ALL
Age
10 Years to 15 Years
Healthy volunteers
Yes

Inclusion criteria

* Subject's parent(s)/Legally Acceptable Representative(s) and subjects who the investigator believes can and are willing to comply with the requirements of the protocol. * A male or female between 10 and 15 years of age at the time of booster vaccination. * Prior to protocol amendment 2, subjects who have previously received 5 doses of diphtheria-tetanus-pertussis vaccine (whole cell/acellular \[w/a\]) as part of primary and booster vaccination, in line with local recommendations. * After protocol amendment 2, subjects who have previously received 6 doses of either DT(P) (w/a)/ dTpa vaccine as part of primary and booster vaccination, in line with local recommendations. * Healthy subjects as determined by the investigator based on medical history and clinical examination before entering into the study. * Written informed consent to be obtained before study entry from the parent(s)/ Legally Acceptable Representative(s) of the subject. * Written informed assent to be obtained from the subject in addition to the informed consent signed by the parent(s)/ Legally Acceptable Representative(s), if required by local regulations. * Female subjects of non-childbearing potential may be enrolled in the study. * Female subjects of childbearing potential may be enrolled in the study, if the subject: * has a negative pregnancy test on the day of vaccination, * if sexually active, has practiced adequate contraception for 30 days prior to vaccination, and has agreed to continue adequate contraception during the entire treatment period and for 2 months after booster vaccination.

Exclusion criteria

* Child in care. * Use of any investigational or non-registered product other than the study vaccine within 30 days preceding the booster dose of study vaccine, or planned use during the study period. * Chronic administration of immunosuppressants or other immune-modifying drugs within six months prior to the booster dose. * Planned administration/administration of a vaccine not foreseen by the study protocol within 30 days of the booster dose of vaccine - with the exception of influenza vaccine which is allowed up to 7 days before the study vaccine dose, or planned in the period ≥ 7 days after the study vaccine dose. * Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational product. * A history of previous or intercurrent diphtheria, tetanus or pertussis disease. * A history of vaccination against these diseases since the 5th or the 6th dose of DT(P)/dT(pa). For subjects who have received the 6th dose of the diphtheria, tetanus and/or pertussis containing vaccine, the interval between the last DT(P)/dT(pa) vaccination and the administration of the study vaccine should be at least 18 months. * Occurrence of any of the following adverse event after a previous administration of a Boostrix vaccine : * known hypersensitivity to any component of the vaccine, or have shown signs of hypersensitivity after previous administration of diphtheria, tetanus or pertussis vaccines, * encephalopathy of unknown aetiology occurring within 7 days following previous vaccination with pertussis-containing vaccine, * transient thrombocytopenia or neurological complications following an earlier immunisation against diphtheria and/or tetanus. * Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination. * History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine. * Administration of immunoglobulins and/or any blood products within the 3 months preceding the first dose of study vaccine or planned administration during the study period. * Acute disease and/or fever at the time of enrolment. * Pregnant or lactating female. * Female planning to become pregnant or planning to discontinue contraceptive precautions, if applicable.

Design outcomes

Primary

MeasureTime frameDescription
Anti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAt Month 1Concentrations are presented as geometric mean concentrations (GMCs), expressed in international units per milliliter (IU/mL).
Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAt Month 1Concentrations are presented as geometric mean concentrations (GMCs), expressed in enzyme-linked immunosorbent assay (ELISA) units per milliliter(EL.U/mL)

Secondary

MeasureTime frameDescription
Number of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)At Day 0 (PRE) vaccine and at Month 1 (POST)A seroprotected subject was defined as a subject whose antibody concentration was greater than or equal to (≥) 5 Enzyme Linked Immunosorbent Assay (ELISA) units per milliliter (EL.U/mL).
Number of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) AntibodiesAt Month 1Booster response to the diphtheria and tetanus antigens, was defined as: for initially seronegative subjects (pre-vaccination concentration \<0.1 IU/mL): antibody concentrations at least 4 times the cut-off (post-vaccination concentration ≥ 0.4 IU/mL); for initially seropositive subjects (pre-vaccination concentration ≥ 0.1 IU/mL): an increase in antibody concentrations of at least 4 times the pre-vaccination concentration.
Number of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.At Month 1Booster response to the PT, FHA and PRN antigens, was defined as: for initially seronegative subjects: antibody concentrations at least 4 times the cut-off (post-vaccination concentration ≥ 20 EL.U/mL); for initially seropositive subjects with pre-vaccination concentration ≥ 5 EL.U/mL and \< 20 EL.U/mL: an increase in antibody concentrations of at least 4 times the pre-vaccination concentration; and for initially seropositive subjects with pre-vaccination concentration ≥ 20 EL.U/mL: an increase in antibody concentrations of at least 2 times the pre-vaccination concentration.
Number of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAt Day 0 (PRE) and at Month 1 (POST)A seroprotected subject was defined as a subject whose antibody concentration was greater than or equal to (≥) 0.1. international units per milliliter (IU/mL), as assessed by the Enzyme Linked Immunosorbent Assay (ELISA).
Number of Subjects With Unsolicited Adverse Events (AEs)Within 31 days (Days 0-30) postAn unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.
Number of Subjects With Any Solicited General SymptomsWithin 4 days (Days 0-3) post vaccination periodAssessed solicited general symptoms were fatigue, temperature \[defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)\], headache and gastrointestinal symptoms. Gastrointestinal symptoms included Nausea, Vomiting, Diarrhea and or Abdominal pain. Any = occurrence of the symptom regardless of intensity grade.
Number of Subjects With Serious Adverse Events (SAEs)During the entire study period (Day 0 - Month 1)Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.
Number of Subjects With Any Solicited Local SymptomsWithin 4 days (Days 0-3) post vaccination periodAssessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade.
Number of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAt Day 0 (PRE) vaccine and at Month 1 (POST)A seroprotected subject is defined as a vaccinated subject with anti-D and anti-T antibody concentration greater than or equal to ( ≥) 1 international units per milliliter (IU/mL).

Countries

Chile, Mexico

Participant flow

Pre-assignment details

During the screening the following steps occurred: check for inclusion/exclusion criteria, contraindications/precautions, medical history of the subjects and signing informed consent forms.

Participants by arm

ArmCount
Boostrix New Group
Subjects, aged 10 to 15 years, received one dose of Boostrix™ vaccine administered using a new syringe presentation (prefilled syringes from a different manufacturer) in the deltoid of the non-dominant arm, at Day 0.
335
Boostrix Prev Group
Subjects, aged 10 to 15 years, received one dose of Boostrix™ vaccine administered using a previous syringe presentation (single dose vial or a prefilled disposable syringe without a needle) in the deltoid of the non-dominant arm, at Day 0.
336
Total671

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyLost to Follow-up26
Overall StudyWithdrawal by Subject31

Baseline characteristics

CharacteristicBoostrix New GroupBoostrix Prev GroupTotal
Age, Continuous11.9 Years
STANDARD_DEVIATION 1.59
11.9 Years
STANDARD_DEVIATION 1.61
11.9 Years
STANDARD_DEVIATION 1.6
Sex: Female, Male
Female
179 Participants178 Participants357 Participants
Sex: Female, Male
Male
156 Participants158 Participants314 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
263 / 335279 / 336
serious
Total, serious adverse events
1 / 3350 / 336

Outcome results

Primary

Anti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody Concentrations

Concentrations are presented as geometric mean concentrations (GMCs), expressed in international units per milliliter (IU/mL).

Time frame: At Month 1

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Boostrix New GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-D6.784 IU/mL
Boostrix New GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-T18.937 IU/mL
Boostrix Prev GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-D6.493 IU/mL
Boostrix Prev GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-T18.515 IU/mL
Comparison: Analysis was performed to demonstrate that Boostrix administered using the new syringe presentation was non-inferior to Boostrix administered using the previous syringe presentation, in terms of immune response to diphteria vaccine antigens, one month after booster vaccination.95% CI: [0.85, 1.09]ANCOVA
Comparison: Analysis was performed to demonstrate that Boostrix administered using the new syringe presentation was non-inferior to Boostrix administered using the previous syringe presentation, in terms of immune response to tetanus vaccine antigens, one month after booster vaccination.95% CI: [0.86, 1.1]ANCOVA
Primary

Anti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody Concentrations

Concentrations are presented as geometric mean concentrations (GMCs), expressed in international units per milliliter (IU/mL).

Time frame: At Day 0

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Boostrix New GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-D0.472 IU/mL
Boostrix New GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-T0.956 IU/mL
Boostrix Prev GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-D0.456 IU/mL
Boostrix Prev GroupAnti-diphteria (Anti-D) and Anti-tetanus (Anti-T) Antibody ConcentrationsAnti-T0.899 IU/mL
Primary

Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody Concentrations

Concentrations are presented as geometric mean concentrations (GMCs), expressed in enzyme-linked immunosorbent assay (ELISA) units per milliliter(EL.U/mL)

Time frame: At Month 1

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PT140.2 EL.U/mL
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-FHA1080.2 EL.U/mL
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PRN652.4 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PT125.9 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-FHA1013.7 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PRN619.2 EL.U/mL
Comparison: Analysis was performed to demonstrate that Boostrix administered using the new syringe presentation was non-inferior to Boostrix administered using the previous syringe presentation, in terms of immune response to pertussis toxoid vaccine antigens, one month after booster vaccination.95% CI: [0.82, 1.04]ANCOVA
Comparison: Analysis was performed to demonstrate that Boostrix administered using the new syringe presentation was non-inferior to Boostrix administered using the previous syringe presentation, in terms of immune response to filamentous haemagglutinin vaccine antigens, one month after booster vaccination.95% CI: [0.83, 1.03]
Comparison: Analysis was performed to demonstrate that Boostrix administered using the new syringe presentation was non-inferior to Boostrix administered using the previous syringe presentation, in terms of immune response to pertactin vaccine antigens, one month after booster vaccination.95% CI: [0.85, 1.13]
Primary

Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody Concentrations

Concentrations are presented as geometric mean concentrations (GMCs), expressed in ELISA units per milliliter (EL.U/mL).

Time frame: At Day 0

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PT PRE7.5 EL.U/mL
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-FHA PRE48.9 EL.U/mL
Boostrix New GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PRN PRE14 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PT PRE7.2 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-FHA PRE49.4 EL.U/mL
Boostrix Prev GroupAnti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutinin (Anti-FHA), Anti-pertactin (Anti-PRN) Antibody ConcentrationsAnti-PRN PRE13.4 EL.U/mL
Secondary

Number of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) Antigens

A seroprotected subject was defined as a subject whose antibody concentration was greater than or equal to (≥) 0.1. international units per milliliter (IU/mL), as assessed by the Enzyme Linked Immunosorbent Assay (ELISA).

Time frame: At Day 0 (PRE) and at Month 1 (POST)

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D PRE284 Participants
Boostrix New GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D POST320 Participants
Boostrix New GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T PRE311 Participants
Boostrix New GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T POST321 Participants
Boostrix Prev GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T POST319 Participants
Boostrix Prev GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D PRE286 Participants
Boostrix Prev GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T PRE314 Participants
Boostrix Prev GroupNumber of Seropositive Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D POST319 Participants
Secondary

Number of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)

A seroprotected subject was defined as a subject whose antibody concentration was greater than or equal to (≥) 5 Enzyme Linked Immunosorbent Assay (ELISA) units per milliliter (EL.U/mL).

Time frame: At Day 0 (PRE) vaccine and at Month 1 (POST)

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PT PRE175 Participants
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PT POST316 Participants
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-FHA PRE310 Participants
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-FHA POST319 Participants
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PRN PRE269 Participants
Boostrix New GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PRN POST321 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PRN PRE272 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PT PRE175 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-FHA POST319 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PT POST315 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-PRN POST318 Participants
Boostrix Prev GroupNumber of Seropositive Subjects With Anti-pertussis Toxoid (Anti-PT), Anti-filamentous Haemagglutin (Anti-FHA) and Anti-pertactin (Anti-PRN) Antibody Concentrations)Anti-FHA PRE310 Participants
Secondary

Number of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) Antigens

A seroprotected subject is defined as a vaccinated subject with anti-D and anti-T antibody concentration greater than or equal to ( ≥) 1 international units per milliliter (IU/mL).

Time frame: At Day 0 (PRE) vaccine and at Month 1 (POST)

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D PRE83 Participants
Boostrix New GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D POST315 Participants
Boostrix New GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T PRE151 Participants
Boostrix New GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T POST321 Participants
Boostrix Prev GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T POST319 Participants
Boostrix Prev GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D PRE89 Participants
Boostrix Prev GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-T PRE143 Participants
Boostrix Prev GroupNumber of Seroprotected Subjects Against Diphtheria (D) and Tetanus (T) AntigensAnti-D POST310 Participants
Secondary

Number of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.

Booster response to the PT, FHA and PRN antigens, was defined as: for initially seronegative subjects: antibody concentrations at least 4 times the cut-off (post-vaccination concentration ≥ 20 EL.U/mL); for initially seropositive subjects with pre-vaccination concentration ≥ 5 EL.U/mL and \< 20 EL.U/mL: an increase in antibody concentrations of at least 4 times the pre-vaccination concentration; and for initially seropositive subjects with pre-vaccination concentration ≥ 20 EL.U/mL: an increase in antibody concentrations of at least 2 times the pre-vaccination concentration.

Time frame: At Month 1

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-PT298 Participants
Boostrix New GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-FHA305 Participants
Boostrix New GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-PRN315 Participants
Boostrix Prev GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-PT295 Participants
Boostrix Prev GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-FHA304 Participants
Boostrix Prev GroupNumber of Subjects With a Booster Response to Pertussis Toxoid (PT), Filamentous Haemagglutinin (FHA), Pertactin (PRN) Antigens.Anti-PRN317 Participants
Secondary

Number of Subjects With Any Solicited General Symptoms

Assessed solicited general symptoms were fatigue, temperature \[defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)\], headache and gastrointestinal symptoms. Gastrointestinal symptoms included Nausea, Vomiting, Diarrhea and or Abdominal pain. Any = occurrence of the symptom regardless of intensity grade.

Time frame: Within 4 days (Days 0-3) post vaccination period

Population: The analysis was performed on the Total Vaccinated cohort, which included all subjects with documented administration of the study vaccine and with the symptom sheet filled-in.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With Any Solicited General SymptomsAny Fatigue83 Participants
Boostrix New GroupNumber of Subjects With Any Solicited General SymptomsAny Gastrointestinal symptoms32 Participants
Boostrix New GroupNumber of Subjects With Any Solicited General SymptomsAny Headache88 Participants
Boostrix New GroupNumber of Subjects With Any Solicited General SymptomsAny Temperature9 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited General SymptomsAny Temperature6 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited General SymptomsAny Fatigue86 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited General SymptomsAny Headache108 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited General SymptomsAny Gastrointestinal symptoms42 Participants
Secondary

Number of Subjects With Any Solicited Local Symptoms

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade.

Time frame: Within 4 days (Days 0-3) post vaccination period

Population: The analysis was performed on the Total Vaccinated cohort, which included all subjects with documented administration of the study vaccine and with the symptom sheet filled-in.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With Any Solicited Local SymptomsAny Pain237 Participants
Boostrix New GroupNumber of Subjects With Any Solicited Local SymptomsAny Redness113 Participants
Boostrix New GroupNumber of Subjects With Any Solicited Local SymptomsAny Swelling98 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited Local SymptomsAny Pain248 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited Local SymptomsAny Redness94 Participants
Boostrix Prev GroupNumber of Subjects With Any Solicited Local SymptomsAny Swelling90 Participants
Secondary

Number of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) Antibodies

Booster response to the diphtheria and tetanus antigens, was defined as: for initially seronegative subjects (pre-vaccination concentration \<0.1 IU/mL): antibody concentrations at least 4 times the cut-off (post-vaccination concentration ≥ 0.4 IU/mL); for initially seropositive subjects (pre-vaccination concentration ≥ 0.1 IU/mL): an increase in antibody concentrations of at least 4 times the pre-vaccination concentration.

Time frame: At Month 1

Population: The analysis was performed on the According To Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) AntibodiesAnti-D257 Participants
Boostrix New GroupNumber of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) AntibodiesAnti-T266 Participants
Boostrix Prev GroupNumber of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) AntibodiesAnti-D252 Participants
Boostrix Prev GroupNumber of Subjects With Booster Response to Diphtheria (D) and Tetanus (T) AntibodiesAnti-T270 Participants
Secondary

Number of Subjects With Serious Adverse Events (SAEs)

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

Time frame: During the entire study period (Day 0 - Month 1)

Population: The analysis was performed on the Total Vaccinated cohort, which included all subjects with documented administration of the study vaccine.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With Serious Adverse Events (SAEs)1 Participants
Boostrix Prev GroupNumber of Subjects With Serious Adverse Events (SAEs)0 Participants
Secondary

Number of Subjects With Unsolicited Adverse Events (AEs)

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination.

Time frame: Within 31 days (Days 0-30) post

Population: The analysis was performed on the Total Vaccinated cohort, which included all subjects with documented administration of the study vaccine.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Boostrix New GroupNumber of Subjects With Unsolicited Adverse Events (AEs)44 Participants
Boostrix Prev GroupNumber of Subjects With Unsolicited Adverse Events (AEs)45 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026